Harlow, William Morehouse,  1900- <br/><br/>
Fruit key and Twig key to trees and shrubs:  Fruit key to northeastern trees ; Twig key to the deciduous woody plants of eastern North America/ 

 - New York :  Dover,  1959. 
 - 50, 56 p. :  ill. 
<br/><br/><label>ISBN: </label>0486205118 
<br/><br/><label>LCCN: </label>59009671 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trees--North America
<br/><br/><label>LC Class. No.: </label>QK481  / .H37