Hanson, Earl D,  <br/><br/>
The origin and early evolution of animals 
by Earl D. Hanson. 
 - 1st ed 
 - Middletown, Conn.  Wesleyan University Press  1977. 
 - ix, 670 pages :    26 cm. 
<br/><br/> Includes indexes 
<br/><br/>Bibliography: p. 594-637 
<br/><br/><label>ISBN: </label>0819550086 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evolution