- On the path of self-destruction [2]
- On the presence of dipetalonema dracunculoides (Cobbold 1870) among dogs in Portugal [2]
- On the survival of the bushmen
- On the terrestrial and riverine fauna of the Democratic Republic of São Tomé and Principe. VII-descrption of toxorhunchites capelai sp. nov. (diptera, culicidae) [2]
- On the third term election of general Carmona as president of Portugal
- On the trail of emin pasha
- On the age of the so called "Lunda stage" in the diamondiferous region of northern Angola [2]
- On the geochemistry of some niobium-tantalum minerals from African pegmatites
- On the great interest to zoologists of the fauna of the portuguese islands of the eastern Atlantic and the importance attached to their conservation, with special relation to the birds
- On the hypothesis of two abandoned arms, in Angola and Brazil, as Branches of one RRR triple junction
- On the incidence of the trypanosomiasis in game
- On the nature and identification of some small trichomonads from the intestine of termites hitherto related to the so called trimitus stages of Duboscq and Grassé
- On the need of a terminology for Quaternary transgressions and regressions in Southern Africa
- On the nomenclature of the thegenuis metschnikowia kamienski
- On the portuguese trade in China
- On the reconstruction of Bantu tecnology and its vocabulary
- On the spot
- On the status of terminal devoicing as an interlanguage process among brazilian learners of english
- On the terrestrial and riverine fauna of the Democratic Republic of São Tomé e Príncipe [3]
- On the age of the the so called Lunda Stage in the diamondiferous region of Northern Angola
- On the background to the rebellion in German East África in 1905-1906
- On the beaver´s back
- On the determinants of nutrition in Mozambique
- On the discovery of Halobiidae (Bivalvia, Triassic) in New Guinea
- On the drainage of Muceque
- On the first round of the Timor-Leste 2007 presidential elections [2]
- On the hypothesis of two abandoned arms, in Angola and Brasil, as branches of on RRR triple junction [2]
- On the hypothesis of two abandoned arms, in Angola and Brasil, as branches of one rrr triple junction
- On the literary structure of the Older Avesta
- On the mineralogy of pegmatites in the Karibib and Usakos area of South-West Africa
- On the move mobility, land use and livelihood pratices on the central plateau in Burkina Faso
- On the occurrence of carbonatites in the Cape Verde islands [5]
- On the prehistory of Mozambique [5]
- On the road to prosperity collaboration between Macau and the pearl river Delta
- On the significance of frontiers in writing American History in Germany
- On the soul of Indian woman as reflected in the folklore of the Konkan
- On the take over of power in Portugal by a Military Junta led by General António de Spínola
- On the terrestrial an rierine fauna of the Democratic Republic of São Tomé and Principe. VII
- On the value of the cercariae membrane reaction (CHR) and the circum-oval precipitin reaction (COP) in the diagnosis of bilharziasis
- On the way to whiteness christianization, conflict and change in colonial Ovamboland, 1910-1965
- On the battfield
- On the European Union and its member's foreign policy
- On the great interest to the zoologists of the fauna of the portuguese islands of the eastern atlantic and the importance attached to their conservations, with special relation to the birds
- On the helminthfauna of wild mammals (Rodentia, Insectivora and Lagomorpha) in Azores Archipelago (Portugal)
- On the marriage of Infanta D. Catharina of Portugal with Charles II of Great Britain, her medals and portraits
- On the mass chimioprophylaxy of malarial areas and its practical results
- On the meaning of the Mahabharata
- On the postcolony [2]
- On the pratical significance of critical international relations theory
- On the quest of merchantilism of mozambican agriculture today
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- On the quoted uniformity of machiloides with descripton of two new genera, a new subgenus and one new species
- On the reconstruction of bantu technology and its vocabulary
- On the road to prosperity
- On the spice trail
- On the time for armed struggle
- On the helminthfauna of wild mammals (Rodentia, Insectivora and Lagomorpha) in Azores Archipelago (Portugal)
- On the border gate [2]
- On the evaluation of the safety if old metallic bridges
- On the forecasting of natural stresses in rock-masses
- On the frontline [3]
- On the genesis of the Cape Verde islands
- On the grammar of the tetum language
- On the late massacre in Mozambique
- On the move [2]
- On the oldest diamondiferous sedimentary rocks found in the north east Lunda and mentioned in "Diamond deposits in Lunda" [2]
- On the oldest diamondiferous sidementary rocks found in the noth east Lunda
- On the original inhabitants of Bharatvarsa or India
- On the path of the prophet
- On the schizogonic forms of a plasmodid found in the blood of the green snake Passerita Mycterizans Daud
- On the taxonomy of Tripogom in West Africa
- On the terrestrial and riverine fauna of the Democratic Republic of São Tomé and Príncipe [6]
- On the terrestrial and riverine fauna of the Democratic Republic of São Tomé and Principe. VII-descrption of toxorhunchites capelai sp. nov. (diptera, culicidae)
- On the african rol in the trans Atlantic slave trade in Dawomey
- On the concept of tribe
- On the Curculionidae (Coleoptera)
- On the eightfold path
- On the episode of the Mahabharata known by the name Bhagavad-Gita by Wilhelm von Humboldt Berlin [2]
- On the god-mask in the Dionysia and Indra Jatra
- On the metamorphosis of pro-and lenco plasts of salanum tuserosum l. into chloroplasts induced by light
- On the oldest diamondiferous sedimentary rocks found in the north east Lunda and mentioned in Diamond deposits in Lunda
- On the origins of the Indian national congresso
- On the path to prominence
- On the reconstruction of the Shenxian zhuan
- On the road to recovery
- On the road with wellington by August Ludolf Friedrich Shaumann
- On the some Gorgonopsian skulls in the collection of the South African Museum
- On the terrestrial and riverine fauna of the Democratic Republic of São Tomé e Príncipe [2]
- On the use of archaeology and history in Island Southeast Asia
- On to Delhi (speeches and writings)
- On truth
- On Upper Albian Ammonoidea from Portuguese East Africa, with an appendix on Upper Cretaceous Ammonites from Maputoland
- On Whether or Not Buddhist Monks Should Bow to the Emperor [2]
- On wind induced instability of television towers
- On women
- On Xuanzang's transliterated version of the sanskrit Prajnaparamitahrdayasutra (Heart Sutra)
- On yoga [2]
- On yuan chwang's
- On-farm experimentation handbook for rural development projects
- Onagraceae [5]
- Onan
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