Judging ripeness of seeds in Black Hills ponderosa pine cones /
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| Main Author: | |
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| Corporate Author: | |
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Fort Collins, Colo. :
Forest Service, U.S. Dept. of Agriculture, Rocky Mountain Forest and Range Experiment Station,
1973.
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| Series: | USDA Forest Service research note RM ;
235. |
| Subjects: |