By Beck Donald E.   in Journal of the American Helicopter Society

ISSN:2161-6027|21|1|21-26

AHS International‎(1976)‎

Access to resources Favorite 15.160461

By Beck Donald E.   in Southern Journal of Applied Forestry

ISSN:0148-4419|7|1|53-57

Society of American Foresters‎(1983)‎

Access to resources Favorite 15.160461

By Beck Donald E.   in Forest Science

ISSN:0015-749X|17|2|252-260

Society of American Foresters‎(1971)‎

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By Della-Bianca Lino   Beck Donald E.   in Southern Journal of Applied Forestry

ISSN:0148-4419|9|3|191-196

Society of American Foresters‎(1985)‎

Access to resources Favorite 10.3946705

By Beck Donald E.   Hooper Ralph M.   in Southern Journal of Applied Forestry

ISSN:0148-4419|10|3|168-172

Society of American Foresters‎(1986)‎

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By Knoebel Bruce R.   Burkhart Harold E.   Beck Donald E.   in Southern Journal of Applied Forestry

ISSN:0148-4419|8|4|185-188

Society of American Foresters‎(1984)‎

Access to resources Favorite 8.499613

By Harrison Wade C.   Burk Thomas E.   Beck Donald E.   in Southern Journal of Applied Forestry

ISSN:0148-4419|10|2|99-104

Society of American Foresters‎(1986)‎

Access to resources Favorite 8.499613