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Changes in technology and labor requirements in crop production : wheat and oats

Changes in technology and labor requirements in crop production : wheat and oats
Paper図書
by Robert B. Elwood ... [et al.]Works Progress Administration, National Research Project1939
Other Libraries in Japan
  • Author HeadingElwood, Robert B.

Changes in technology and labor requirements in crop production : vegetables

Changes in technology and labor requirements in crop production : vegetables
Paper図書
by J.C. Schilletter, Robert B. Elwood and Harry E. KnowltonWorks Progress Administration, National Research Project1939
Other Libraries in Japan
  • Author HeadingSchilletter, Julian Claude Elwood, Robert B. Knowlton, Harry E.

Changes in technology and labor requirements in crop production : potatoes

Changes in technology and labor requirements in crop production : potatoes
Paper図書
by Harry E. Knowlton, Robert B. Elwood, and Eugene G. McKibbenWorks Progress Administration, National Research Project1938
Other Libraries in Japan
  • Author HeadingKnowlton, Harry E. Elwood, Robert B. McKibben, Eugene G.

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