By Wray Robert   in Australian Geographer

ISSN:1465-3311|40|1|29-49

Routledge Ltd‎(2009)‎

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By Wray Robert D.   in Journal of Forestry

ISSN:0022-1201|50|1|26-30

Society of American Foresters‎(1952)‎

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By Wray Robert D.   in Journal of Forestry

ISSN:0022-1201|75|2|77-79

Society of American Foresters‎(1977)‎

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By Young Robert W.   Wray Robert A.L.   in Zeitschrift für Geomorphologie, Supplementary Issues

ISSN:1864-1687|59|1|3-17

E. Schweizerbart'sche Verlagsbuchhandlung‎(2015)‎

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