Maheshwari, P. <br/><br/>
Evolution of the ovule 
P. Maheshwari 
 - Lucknow  Birbal Sahni Institute of Palaeobotany  1960 
 - 13p.; 25cm.- 
 - Sir Albert Charles Seward memorial lecture; no.7 .
<br/><br/><label>Dewey Class. No.: </label>561.2  / MAH