Glaessner, Martin F.,  1906- <br/><br/>
The dawn of animal life :  a biohistorical study / 
Martin F. Glaessner 
 - Cambridge :  Cambridge University Press,  1984 
 - 244 p. :  ill. ;  24 cm. 
 - Cambridge earth science series .
<br/><br/> Includes index 
<br/><br/>Bibliography : p. 218-236 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates, Fossil<br/>Marine invertebrates--Evolution<br/>Paleontology--Pre--Cambrian