Yazar
united states forest insect laboratory
2 cilt bulundu.
Cilt sonuçları
Notes on some items involved in checking contract spray planes
United States. Forest Insect Laboratory, Beltsville, Md · Yayınevi bilinmiyor
Sayfa sayısı yok · 1958
Pesticides / Agricultural chemicals
A comparison of the deposits obtained from aerial sprays released at altitudes of fifty and two hundred feet, 1951 season
United States. Forest Insect Laboratory, Beltsville, Md · Yayınevi bilinmiyor
12 sayfa · 1952
Airplane Spraying