Kier, Porter M. <br/><br/>
Echnoids from the triassic( St. Cassian) of italy, their lantern supports, and a revised phylogeny of triassic echinoids   
by Porter M. Kier. 
 - Washington  Smithsonian Institution Press  1984 
 - iii, 41p. 
 - Smithsonian contributions to paleobiology  No.56 .
<br/><br/><label>Dewey Class. No.: </label>563.95  / N84