The IUCN invertebrate red data book 
compiled jointly by Susan M. Wells, Robert M. Pyle and N. Mark Collins of the IUCN Conservation Monitoring Centre .... 
 - Gland, Switzerland :  IUCN,  1983. 
 - 632 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>2880326028 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates.<br/>Invertebrate populations.