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a vincent osmun
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Cilt sonuçları
Apple insects and diseases, and their control
H. T. Fernald, A. Vincent Osmun · Wright & Potter Printing Co.
44 sayfa · 1921
Apples / Diseases and pests
Potato insects and diseases and their control
H. T. Fernald, A. Vincent Osmun, John B. Abbott · Extension Service, Massachusetts Agricultural College
12 sayfa · 1921
Potatoes / Diseases and pests / Insect pests / Control