Plant systematics:  Theory and practice / 
Gurucharan Singh. 
 - Calcutta:  Oxford and IBH Publishing,  1999. 
 - x, 359p., ill.; 24cm. 
<br/><br/><label>ISBN: </label>81-204-1364-4. 
<br/><br/><label>Dewey Class. No.: </label>582.13 G96P