CIH key to the groups and genera of nematode parasites of invertebrates / 
edited by G. O. Poinar, Sheila Willmott 
 - Farnham Royal :  Commonwealth Agricultural Bureaux,  1977 
 - 43 p. :  ill. ;  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nematoda--Classification<br/>Nematoda--Identification<br/>Parasites--Vertebrates