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Stanley Black Fracker
7 cilt bulundu.
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The classification of lepidopterous larvae
Stanley Black Fracker · Johnson Reprint Corp.
169 sayfa · 1915
Lepidoptera / Larvae / Caterpillars / Classification / Larva
Synopsis of federal plant quarantines affecting interstate shipments in effect January 1, 1934
Stanley Black Fracker · U.S. Dept. of Agriculture
135 sayfa · 1934
Plant quarantine / Farm produce / Transportation / Law and legislation
The status of white pine blister rust control
Stanley Black Fracker · Yayınevi bilinmiyor
20 sayfa · 1934
Cronartium ribicola / Forestry / Plant pathogenic fungi / Plant health / Fungal diseases of plants
Tobacco wildfire in Wisconsin
James Johnson, Stanley Black Fracker · Agricultural Experiment Station, University of Wisconsin
21 sayfa · 1922
Tobacco / Diseases and pests