Yazar
thomas w koerber
2 cilt bulundu.
Cilt sonuçları
Insects destructive to the Douglas-fir seed crop in California
Thomas W. Koerber · U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station
36 sayfa · 1960
Douglas fir / Contarinia / Seeds / Torymidae / Dioryctria
Lindane in forestry
Thomas W. Koerber · U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station
30 sayfa · 1976
Bark beetles / Control / Environmental aspects / Environmental aspects of Pesticides / Pesticides