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- a41004356 contributor B12841939.
- a41004356 contributor B12841940.
- a41004356 created "1938.".
- a41004356 date "1938".
- a41004356 date "1938.".
- a41004356 dateCopyrighted "1938.".
- a41004356 description "Bibliographical foot-notes.".
- a41004356 extent "xviii, 181 p.".
- a41004356 isPartOf "National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques. Studies of changing techniques and employment in agriculture. [Report no. A-5]".
- a41004356 issued "1938".
- a41004356 issued "1938.".
- a41004356 language "eng".
- a41004356 publisher "Philadelphia, Pa.,".
- a41004356 spatial "United States".
- a41004356 spatial "United States.".
- a41004356 subject "Agricultural laborers United States.".
- a41004356 subject "Corn United States".
- a41004356 subject "Farm mechanization United States".
- a41004356 subject "S441 .N3 no. A-5".
- a41004356 title "Changes in technology and labor requirements in crop production: corn, by Loring K. Macy, Lloyd E. Arnold, and Eugene G. McKibben. Works Progress Administration, National Research Project.".
- a41004356 type "text".