Houbrick, Richard <br/><br/>
Anatomy, reproductive biology and phylogeny of the planaxidae (Cerithiaccea-Prosobranchia) / 
Ricahrd S. Houbrick 
 - Washington :  Smithsonian Institution Press,  1987 
 - iii, 57 p. :  ill. ;  28 cm. 
 - Smithsonian contributions to zoology  no. 445 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Planaxide