Patterson, D. J. <br/><br/>
Free-living fresh water protozoa :  a colour guide / 
D. J. Patterson and illustrated by S. Hedley. 
 - London :  Wolfe Publishing Co.,  1992. 
 - 223 p. :  ill. ;  27 cm. 
<br/><br/>Includes index and bibliography. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0723416834 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Protozoa--guide.