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albert frederick conradi
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Farm spies
Albert F. Conradi · The Macmillan Company
165 sayfa · 1916
Agricultural pests / Injurious and beneficial Insects / Insect pests / Beneficial insects / Textbooks
Hook-worm disease of cattle (Uncinariasis)
Albert F. Conradi, E. Barnett · South Carolina Agricultural Experiment Station
23 sayfa · 1908
Hookworm disease / Cattle / Diseases