Petrides, George A. <br/><br/>
A field guide to trees and shrubs :  field marks of all trees, shrubs, and woody vines that grow wild in the north /astern and north-central United States and in south-eastern and south-centralCanada / 
by George A. Petrides, Illus. by George A. Petrides and Roger Tory Peterson 
 - 2nd ed. 
 - Boston :  Houghton Mifflin,  1972 
 - xxxii, 428 p. :  ill. (part col.) ;  19 cm. 
<br/><br/><label>ISBN: </label>0395136512 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trees--Identification--United States<br/>Shrubs--Identification--United States<br/>Trees--Identification--Canada<br/>Shrubs--Identification--Canada<br/>Climbing plants--Identification--United States<br/>Climbing plants--Identification--Canada