National Wildlife Federation Field Guide to Trees of North America
by Bruce Kershner,Craig Tufts,Daniel Mathews,Gil Nelson,Richard Spellenberg,John W Thieret,Terry Purinton,Andrew Block,Gerry Moore
ISBN 13: 9781402738753
Format: Illustrated (528 pages) Publisher: Union Square & Co. Published: 09 May 2008
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Trees of Western North America (Princeton Field Guides): 94
by Richard Spellenberg, Christopher J. Earle, Gil Nelson, Amy K. Hughes, David More
ISBN 13: 9780691145808
Format: Illustrated (560 pages) Publisher: Princeton University Press Published: 27 Jul 2014