%0 E-Resource %0 U.S. Federal Government Document %0 Book %A Rehfeldt, G. E. %E Intermountain Forest and Range Experiment Station (Ogden, Utah) %E United States. Forest Service %I United States Department of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station %D 1982 %C Ogden, Utah %G English %B Research paper INT ; %T Ecological adaptions in Douglas-fir populations %U http://purl.fdlp.gov/GPO/gpo37357