Thomas, Waller R. <br/><br/>
Scanning electron microscopy of shell and mantle in the order arcoida 
by Waller R. Thomas. 
 - Washignton  Smithsonian Institution Press  1980 
 - iii, 58p. 
 - Smithsonian contribution to zoology-313   .
<br/><br/><label>Dewey Class. No.: </label>594.11  / N80