W. D. Williams, <br/><br/>
PARKER & HASWELL TEXTBOOK OF ZOOLOGY : INVERTEBRATES ( VOL -1 ) 
by A. J. Marshall & W. D. Williams 
 - 7th Ed. 
 - New Delhi:  AITBS Publishers,  2018. 
 - xix, 874pg:  24cm. 
<br/><br/><label>ISBN: </label>81-7473-031-1 
<br/><br/><label>Subjects--Personal Names: </label><br/>ZOOLOGY.
<br/><br/><label>Subjects--Topical Terms: </label><br/>Specific topics in natural history
<br/><br/><label>Dewey Class. No.: </label>591.01  / MAR