APA
Ledig F., Porterfield R. L., . (1981). West Coast Tree Improvement Programs: a break-even, cost benefit analysis. : .
Chicago
Ledig F.Thomas, Porterfield Richard L, . 1981. West Coast Tree Improvement Programs: a break-even, cost benefit analysis. : .
Harvard
Ledig F., Porterfield R. L., . (1981). West Coast Tree Improvement Programs: a break-even, cost benefit analysis. : .
MLA
Ledig F.Thomas, Porterfield Richard L, . West Coast Tree Improvement Programs: a break-even, cost benefit analysis. : . 1981.
SerieJęzyk: angielski Serie: Research Paper. Pacific Northwest Forest and Range Experiment Station ; PSW-156Szczegóły wydania: 1981.Opis: s. [2], 8 : tab. ; 27 cm.Tematy:
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