By Thompson Emmett F.   Richards Douglas P.   in Journal of Forestry

ISSN:0022-1201|68|10|624-627

Society of American Foresters‎(1970)‎

Access to resources Favorite 10.498243

By Duncan Donald P.   Skok Richard A.   Richards Douglas P.   in Journal of Forestry

ISSN:0022-1201|87|9|31-37

Society of American Foresters‎(1989)‎

Access to resources Favorite 8.586065