Harlow, William M. <br/><br/>
Fruit key and twig key to trees and shrubs :  fruit key to Northeastern trees; twig key to decicuous woody plants of Eastern North America / 
William M. Harlow. 
 - New York :  Dover Publications,  1946. 
 - 56 p. :  plates ;  22 cm. 
<br/><br/>Includes index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany--North America.<br/>Trees--North America.<br/>Shrubs--North America.<br/>Buds.