Yazar
Roy Montgomery
20 cilt bulundu.
Alexander Septimus Alexander, Daniel Henry Otis, Edmond Joseph Delwiche, Fritz Wilhelm Woll, George Colvin Humphrey, Harry Luman Russell, James Garfield Moore, Stephen Moulton Babcock, Edward Holyoke Farrington, Edwin Bret Hart, Roy T. Harris · Yayınevi bilinmiyor
760 sayfa · 1909
Agriculture
Frank H. Ballou, Guyton. T. L. (Thomas Lee), Henry Ernest Erdman, J. W. Hammond, Ohio Agricultural Experiment Station, Roy Israel Grady, Wayne Lewis Robinson, William Henry Alexander · Yayınevi bilinmiyor
472 sayfa · 1919
Agricultural experiment stations
Alexander Septimus Alexander, Andrew Robeson Whitson, Edmond Joseph Delwiche, Edward Holyoke Farrington, Fritz Wilhelm Woll, Harry Luman Russell, William Arnon Henry, Daniel Henry Otis, Edwin George Hastings, George Alfred Olson, Roy T. Harris · Yayınevi bilinmiyor
490 sayfa · 1906
Agricultural experiment stations
Arthur Newell Talbot, Lester Paige Breckenridge, Roy Irvin Webber, University of Illinois (Urbana-Champaign campus). Engineering Experiment Station, University of Illinois at Urbana-Champaign. Engineering Experiment Station, Samuel Wilson Parr, Henry Bernhard Dirks · Yayınevi bilinmiyor
496 sayfa · 1904
Coal