Preston, Richard J. <br/><br/>
North American trees (exclusive of Mexico and tropical United States)/ 
Richard J. Preston, Jr. 
 - Cambridge:  MIT Press,  1966. 
 - 395 p:  fig.;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trees--United States--Identification.<br/>Trees--Canada--Identification.
<br/><br/><label>LC Class. No.: </label>SPE-B 2386