Nichols, David,  1930- <br/><br/>
Echinoderms 
David Nichols 
 - London :  Hutchinson University Library,  1969 
 - 192 p. :  ill. ;  22 cm. 
<br/><br/>Bibliography : p. 176-184 
<br/><br/><label>ISBN: </label>0090659937 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Echinodermata