ID:DA13319719
同姓同名の著者を検索
Edwin G. Nourse . Frank Robotka . E. Fred Koller
American Institute of Cooperation 1947 Quarterly publications / [American Institute of Cooperation] 9
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[by E. G. Nourse and Frank Robotka]
Iowa State College of Agriculture and Mechanic Arts 1924 Extension service bulletin / Iowa State College of Agriculture and Mechanic Art, Extension Service No. 85
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by Frank Robotka
Govt. Print. Off. 1923 Department Bulletin / United States Department of Agriculture no. 1150
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by John D. Black, Frank Robotka, and Paul L. Miller
University of Minnesota 1921 Bulletin / The University of Minnesota, cooperating with the Bureau of Markets United States Department of Agriculture 195
by B.B. Mason, Frank Robotka and A.V. Swarthout
Govt. Print. Off. 1919 Bulletin / U. S. Department of Agriculture no. 811
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B.H. Hibbard and Frank Robotka
Agricultural Experiment Station of the University of Wisconsin 1915 Bulletin / Agricultural Experiment Station of the University of Wisconsin 247