Schopmeyer, C. S. (1974). Seeds of woody plants in the United States. Forest Service.
Chicago-čujuhus (17. p.)Schopmeyer, C. S. Seeds of Woody Plants in the United States. Washington, D.C: Forest Service, 1974.
MLA-čujuhus (9. p.)Schopmeyer, C. S. Seeds of Woody Plants in the United States. Forest Service, 1974.
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