Yazar
George Colvin Humphrey
19 cilt bulundu.
Benjamin Horace Hibbard, David R. Mitchell, Earl Frederick Buck, Edwin Bret Hart, George Simon Wehrwein, Gustav Bohstedt, John Charles Walker, University of Wisconsin. Agricultural Experiment Station · Yayınevi bilinmiyor
804 sayfa · 1932
Agriculture
Andrew Robeson Whitson, Emil Peter Sandsten, Fritz Wilhelm Woll, Harry Luman Russell, Ransom Asa Moore, Alden Lescombe Stone, Charles William Stoddart, Conrad Hoffmann, Edmond Joseph Delwiche, George Colvin Humphrey, Roy T. Harris · Yayınevi bilinmiyor
526 sayfa · 1909
Agriculture
E. P. Spandsten, Edwin Bret Hart, Elmer Verner McCollum, Fritz Wilhelm Woll, John Langley Sammis · Yayınevi bilinmiyor
448 sayfa · 1909
Animal nutrition
Christian Bernhardus Hardenberg, Emil Peter Sandsten, Harry Luman Russell, Conrad Hoffmann · Yayınevi bilinmiyor
23 sayfa · 1908
Cranberries
Otto R. Zeasman, University of Wisconsin--Madison. Agricultural Experiment Station · Yayınevi bilinmiyor
Sayfa sayısı yok · 1921
Dairy barns
George Colvin Humphrey, G. Bohstedt, University of Wisconsin. Extension Service · Yayınevi bilinmiyor
80 sayfa · 1937
Dairy cattle
Daniel Henry Otis, Edmond Joseph Delwiche, George Colvin Humphrey, Harley Frost Wilson, Harry Luman Russell, J. W. Brann, John Edward Dudley, Ransom Asa Moore, Theodore Macklin · Yayınevi bilinmiyor
19 sayfa · 1921
Agriculture
Fritz Wilhelm Woll, University of Wisconsin--Madison. Agricultural Experiment Station · Yayınevi bilinmiyor
16 sayfa · 1914
Dairy cattle