Singh, Gurdarshan <br/><br/>
An introduction to protochordata 
by Gurdarshan Singh, H. Bhaskar 
 - New Delhi  Campus Books International  2003 
 - 170 p. : ill ; 23 cm 
<br/><br/><label>ISBN: </label>8180300064 
<br/><br/><label>Dewey Class. No.: </label>592 GUR