ID:DA10172330
Powell, G. Harold (George Harold)
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by G. Harold Powell
University of California 1920 Circular / College of Agriculture, Agricultural Experiment Station, University of California no. 222
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[University of California, College of Agriculture] [1914] Circular no. 123
Macmillan 1913 The rural science series
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by G. Harold Powell . by E.M. Chace
Govt. Print. Off. 1909 U.S. Department of Agriculture, Bureau of Plant Industry bulletin no. 160 . Italian lemons and their by-products
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by George Harold Powell
Government Printing Office 1908 U.S. Department of Agriculture, Bureau of Plant Industry bulletin no. 123
by G. Harold Powell and S.H. Fulton
Govt. Print. Off. 1903 U.S. Department of Agriculture, Bureau of Plant Industry bulletin no. 48
Govt. Print. Off. 1903 U.S. Department of Agriculture, Bureau of Plant Industry bulletin no. 40
