John Frederick Duggar

John Frederick Duggar · U.S. Dept. of Agriculture, Bureau of Animal Industry

28 sayfa · 1908

Beef cattle

John Frederick Duggar · Agricultural Experiment Station of the Agricultural and Mechanical College

19 sayfa · 1899

Field experiments / Cotton

Duggar, John Frederick. · McGraw-Hill

147 sayfa · 1984

Architectural drawing / Engineering drawings

John Frederick Duggar · Creative Media Partners, LLC

Sayfa sayısı yok · 2018

Kategori yok

John Frederick Duggar · Gov't print. off.

30 sayfa · 1897

Sweet potatoes / Diseases and pests