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1Cooperative tree improvement in the Douglas fir region (of Oregon and Washington, USA) Cooperative tree improvement in the Douglas fir region (of Oregon and Washington, USA)by Wheat, J., FAO, Rome (Italy). Forestry Dept. eng, World Consultation on Forest Tree Breeding eng 21 Mar 1977 3 Canberra (Australia), Silen, R., Commonwealth Scientific and Industrial Research Organization, Canberra (Australia) eng
Published 1978Texto bibliotecaFAO IT