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Sweetpotato Production
Carlton Herbert Ragland
Dorothy Dickins
H. D. Polk
L. A. Davidson
Olive Sheets
Paul S. McComas
Wayne Henry Freeman
William Stacy Anderson
Alice Bowie
C. E. Barnett
John Wiloughby Randolph
其他書名
Time of Planting and Hill Spacing Studies
出版
Mississippi State College, Agricultural Experiment Station
, 1942
URL
http://books.google.com.hk/books?id=DM1QAQAAMAAJ&hl=&source=gbs_api