Gertsch, Willis J.  1906- <br/><br/>
American spiders / 
by Willis J. Gertsch 
 - Princeton, N.J. :  D. Van Nostrand Company,  1949 
 - xiii, 285 p. :  ill., (part col.) ;  22 cm. 
<br/><br/>Bibliography : p. 271-272 
<br/><br/><label>LCCN: </label>49-011600 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Spiders--North America