Nichols, David . <br/><br/>
Echinoderms /  Textual Documents 
David Nichols. 
 - 4th Rev. ed. / 
 - London :  Hutchinson University Library ,  C1967. 
 - 192p. :  ill ;  21cm . 
<br/><br/>Index 
<br/><br/><label>Subjects--Index Terms: </label>Zoology Zoology-Echinoderms G-Zoology 
<br/><br/><label>Dewey Class. No.: </label>593.9  / N 548 Ec