A text-Book of Biology class XI 

 - Lahore:  Punjab Text Book Board,  1992. 
 -  244p. 
<br/><br/> PB 
<br/><br/><br/>Eng 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology
<br/><br/><label>Dewey Class. No.: </label>574  / BIO