Presented as Thesis (Ph. D.)--University of Wisconsin--Madison, 1924. / Cover title. Reprinted from Journal of agricultural research, vol. XXXI, no. 9 (1 Nov. 1925). Includes bibliographical references (p. 825).
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/628203434 |
| Date | January 1925 |
| Creators | Davis, Ray J. |
| Publisher | Washington, D.C. : G.P.O., |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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