By Osborne J. G.   in Journal of Forestry

ISSN:0022-1201|37|4|296-304

Society of American Foresters‎(1939)‎

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By Osborne J. G.   in Forest Science

ISSN:0015-749X|2|3|186-186

Society of American Foresters‎(1956)‎

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By Osborne J. G.   Harper V. L.   in Journal of Forestry

ISSN:0022-1201|35|1|63-68

Society of American Foresters‎(1937)‎

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By Osborne J.G.   Calhoun D.O.   in Journal of Experimental Child Psychology

ISSN:0022-0965|68|1|35-50

Academic Press‎(1998)‎

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