Number | Name | Date | Kind |
---|---|---|---|
2292938 | Hennessy | Aug 1942 | |
3323216 | Ublacker | Jun 1967 | |
3380167 | Abel, Jr. et al. | Apr 1968 | |
3381750 | Brown | May 1968 | |
3483745 | Ublacker | Dec 1969 | |
4044470 | Dufrene | Aug 1977 |
Entry |
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Soiltest Inc., Evanston, Illinois; General Catalog, vol. 2, pp. 124 and 125. |
Earth Manual, U.S. Dept. of Interior Bureau of Reclamation, First Edition-2nd Printing, Denver, Colorado 1968, pp. 672-689. |