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Displaying 1-1 of 1 results for author "Helgerson, O. T. (Ole Terrence)"
Mulches aid in regenerating California and Oregon forests : past, present, and future / Philip M. McDonald, Ole T. Helgerson.
- Text
- Berkeley, Calif. (P.O. Box 245, Berkeley 94701) : U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Research Station, [1990]
- 1990
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