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Title: California tree seed zones
Author: Buck, John M.; Adams, Ronald S.; Cone, Jerrold; Conkle, M. Thompson; Libby, William J.; Eden, Cecil J.; Knight, Michel J.;
Source: San Francisco: California Region, Forest Service, U.S. Department of Agriculture; 5 p
Publication Series: Miscellaneous
Description: California forest tree seed zones were established originally by Fowells (1946), with revisions proposed by Roy (1963) and Schubert (1966). The Forest Tree Seed Committee of the Northern California Section, Society of American Foresters, has revised the original zones and updated the recording system described in the earlier reports. Fowells' (1946) Research Note should be reviewed for background material. Portions of Schubert's (1966) proposals were incorporated in the new system.
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Buck, John M.; Adams, Ronald S.; Cone, Jerrold; Conkle, M. Thompson; Libby, William J.; Eden, Cecil J.; Knight, Michel J. 1970. California tree seed zones. San Francisco: California Region, Forest Service, U.S. Department of Agriculture; 5 p.
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