By Duffield John W.   in Southern Journal of Applied Forestry

ISSN:0148-4419|1|1|1-1

Society of American Foresters‎(1977)‎

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By Duffield John W.   in Forest Science

ISSN:0015-749X|6|4|362-362

Society of American Foresters‎(1960)‎

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By Duffield John W.   in Journal of Forestry

ISSN:0022-1201|40|11|859-864

Society of American Foresters‎(1942)‎

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By Duffield John W.   in Forest Science

ISSN:0015-749X|3|1|60-60

Society of American Foresters‎(1957)‎

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By Duffield John W.   in Forest Science

ISSN:0015-749X|11|4|462-462

Society of American Foresters‎(1965)‎

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By Duffield John W.   in Forest Science

ISSN:0015-749X|6|2|154-154

Society of American Foresters‎(1960)‎

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By Duffield John S.   in Contemporary Security Policy

ISSN:1352-3260|33|1|1-26

Routledge Ltd‎(2012)‎

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By Duffield John W.   in Journal of Forestry

ISSN:0022-1201|48|1|41-45

Society of American Foresters‎(1950)‎

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By Duffield John W.   in Forest Science

ISSN:0015-749X|8|2|167-167

Society of American Foresters‎(1962)‎

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By Duffield John W.   in Forest Science

ISSN:0015-749X|7|4|319-319

Society of American Foresters‎(1961)‎

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