Yazar
l o howard
28 cilt bulundu.
L. O. Howard · U.S. Dept. of Agriculture, Bureau of Entomology
Sayfa sayısı yok · 1902
Hydrocyanic acid gas / Pesticides / Insect pests / Control
L. O. Howard · U.S. Dept. of Agriculture, Division of Entomology
29 sayfa · 1895
Pesticides / Injurious and beneficial Insects / Law and legislation / Insect pests
L. O. Howard · The Macmillan company
333 sayfa · 1933
Biography / Control / Entomologists / Injurious and beneficial Insects / Insect pests
Samuel Hubbard Scudder, William Morris Davis, C. W. Woodworth, L. O. Howard, Charles V. Riley, Samuel Wendell Williston · S.H. Scudder
1267 sayfa · 1889
Butterflies / Papillons / Speciation
L. O. Howard · Frederick A. Stokes company
312 sayfa · 1911
Flies / Flies as carriers of disease / Houseflies / Insect Control / Insect Vectors
L. O. Howard · U.S. Dept. of Agriculture, Division of Entomology
93 sayfa · 1897
Insect pests / Entomology
L. O. Howard · U.S. Dept. of Agriculture, Division of Entomology
131 sayfa · 1896
Insect pests / Household pests / Household Insects
L. O. Howard · Arno Press
344 sayfa · 1977
Biological control / Browntail moth / Gypsy moth / Parasites / Moths, north america
L. O. Howard · Yayınevi bilinmiyor
33 sayfa · 1899
Insects, Injurious and beneficial. [from old catalog]
L. O. Howard · Govt. print. off.
Sayfa sayısı yok · 1905
Geographical distribution / Mosquitoes / Yellow fever