Fossil and recent sponges / 
eds. J. Reitner H. Keupp 
 - Berlin :  Springer-Verlag,  1991 
 - xviii, 595 p. :  ill ;  24 cm. 
<br/><br/><label>ISBN: </label>3540525092 
<br/><br/><label>LCCN: </label>90-041848 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sponges--Congresses<br/>Sponges, Fossil--Congresses