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Andrew Jackson Dadisman
Clayton Roberts Orton
Felix John Schneiderhan
H. O. Henderson
Harry E. Knowlton
Homer King Rowley
Kyle Chester Westover
Melvin Butler Hoffman
William Henry Childs
J. M. Ashcroft
James V. Hopkins
出版
Agricultural Experiment Station, College of Agriculture, West Virginia University
, 1930
URL
http://books.google.com.hk/books?id=rZRRAQAAMAAJ&hl=&source=gbs_api