Gertsch, Willis J.  1906- <br/><br/>
American spiders / 
Willis J. Gertsch 
 - 2nd ed. 
 - New York :  Van Nostrand Reinhold Co,  1979 
 - xiii, 274 p.,  32  leaves of plates :  ill., (some col.) ;  24 cm. 
<br/><br/> Includes index 
<br/><br/>Bibliography: p. 259-260 
<br/><br/><label>ISBN: </label>0442226497 
<br/><br/><label>LCCN: </label>78-6646 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Spiders--North America<br/>Arachnida--North America