Origin and evolution of gymnosperms /  
edited by  Charles B. Beck. 
 - /  
 - Dehra Dun :   Bishen Singh Mahendra Pal Singh ,   1988. 
 - xiv, 504 p. :   ill. ;   29 cm. .  
<br/><br/>Includes bibliographical referrences and index. 
<br/><br/><label>ISBN: </label> RS1,495.00 (HB) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GYMNOSPERMS - ORIGIN<br/>GYMNOSPERMS - FOSSIL<br/>GYMNOSPERMS - EVOLUTION<br/>PALEOBOTANY
<br/><br/><label>Dewey Class. No.: </label>561.5  / BEC/O