Birbal Sahni Institute of Palaeobotany <br/><br/>
Symposium on Structure Nomenclature & Classification of Pollen & Spores 

 -  B S I, Lucknow 
 - pp 73;   24*18 
<br/><br/><label>Dewey Class. No.: </label>I5,116:11p2/N74/B13967