...Theirs was theonly soil, climate, and society suited to slavery; in the othercolonies, with few exceptions, the institution was by thesesame factors doomed from the beginning... 
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...In this sense bacteria are most important factors in causinggritty deposits in the urine...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...That was his power—a law of the factors that had come down through thecenturies...
James Oliver Curwood 「Baree, Son of Kazan」
...' Considerable difference of opinion hasexisted as to factors causing histolysis, and for a summary of theconflicting or complementary theories, the reader is referred to thework of L...
Geo. H. Carpenter 「The Life-Story of Insects」
...A lucky find provided me with the factors required...
Jean Henri Fabre Alexander Teixeira de Mattos 「The Glow-Worm and Other Beetles」
...Several possible factors appear reasonablyclear...
Francis Harper 「The Barren Ground Caribou of Keewatin」
...This mortality probably is related to two factors,negative human attitudes toward wolves andaccessibility of humans to wolf range...
Thomas F. Weise 「An Experimental Translocation of the Eastern Timber Wolf」
...The distributions of animals are influenced by geographic, vegetational,and altitudinal factors...
Sydney Anderson 「Mammals of Mesa Verde National Park, Colorado」
...The various mortality factors which regulate the numbers of opossumsare not well known, and even less is known regarding the relativeimportance of the factors...
Henry S. Fitch 「Ecology of the Opossum on a Natural Area in Northeastern Kansas」
...The relatively lowrate of reproduction (see ) indicates comparative freedom frominimical factors...
Charles T. Vorhies and Walter P. Taylor 「Life History of the Kangaroo Rat」
...Apparently, the availability ofthese foods is one of the major factors affecting the distribution ofP...
Charles L. Douglas 「Comparative Ecology of Pinyon Mice and Deer Mice in Mesa Verde National Park, Colorado」
...Now that the important ecological factors of the major environmentshave been outlined, we may examine the local distribution of amphibiansin each of these...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
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