Presented as Thesis (Ph. D.)--University of Wisconsin--Madison, 1917. / Cover title. Reprinted from Journal of agricultural research, vol. XII, no. 4 (28 Jan. 1918). Includes bibliographical references (p. 227-230).
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/609164835 |
| Date | January 1918 |
| Creators | Hills, Thomas Lawrence, |
| Publisher | Washington : G.P.O., |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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