Yazar
William Granville Hummel
15 cilt bulundu.
John Jesse Vernon, William Granville Hummel · Yayınevi bilinmiyor
230 sayfa · 1909
Agricultural machinery
Charles William Woodworth, Ernest Brown Babcock, Frederic Theodore Bioletti, Frederick Llewellyn Griffin, George Wright Shaw, Harold Child Bryant, University of California, Davis, Amos John Gaumnitz, Leon O. Bonnet, William Granville Hummel · Yayınevi bilinmiyor
438 sayfa · 1913
Agricultural education
Bernard Alfred Etcheverry, Bertram Hanford Crocheron, Charles William Woodworth, Frederic Theodore Bioletti, Thomas Forsyth Hunt, W. V. Shear, William Granville Hummel · Yayınevi bilinmiyor
548 sayfa · 1915
Agricultural education
Arthur William Hummel, Ruth Bookwalter Hummel · Yayınevi bilinmiyor
Sayfa sayısı yok · 1905
Beijing (China)
Ernest Brown Babcock, Frederick Llewellyn Griffin, William Granville Hummel · Yayınevi bilinmiyor
8 sayfa · 1912
Agricultural education
Franklin Ernest Heald, Lucinda Wyman Prince, United States. Bureau of Education, United States. Federal Board for Vocational Education, United States. Federal Board of Vocational Education, William Granville Hummel · Yayınevi bilinmiyor
43 sayfa · 1918
Agricultural education