Thesis (Ph. D.)--Columbia University, 1940. / Reproduced from type-written copy. Vita. "References" : leaves 109-113. Bibliography: leaves 109-113.
Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/608342621 |
Date | January 1940 |
Creators | Kollmorgen, Walter Martin, |
Publisher | Washington, D.C., U.S. Dept. of agriculture, Bureau of agricultural economics, |
Source Sets | OCLC |
Language | English |
Detected Language | English |
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