Mooi, Rich <br/><br/>
Living and fossil genera of the clypeasteroida (Echinoidea  Echinodermata) :  an illustrated key and annotated checklist / 
Rich Mooi 
 - Washington :  Smithsonian Institution Press,  1989 
 - iii, 51 p. :  ill. ;  28 cm. 
 - Smithsonian contributions to zoology  no. 488 .
<br/><br/> Distributed to depository libraries in microfiche. 
<br/><br/>Includes bibliographical references (p. 50-51). 
<br/><br/><label>LCCN: </label>oc-m19-741729 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sand dollars--Identification