Birbal Sahni Institute of Palaeobotany <br/><br/>
The Palaeobotanist Vol 17 No 1-3 

 -  Birbal Sahni Inst, Lucknow 
 - pp 331;   25*18 
<br/><br/><label>Dewey Class. No.: </label>I:8m2,N52/N68.17/B07409