Gupta Shakti M <br/><br/>
Birbal sahni 
Gupta Shakti M 
 -  1978 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>50170 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Paleobotany<br/>Botany
<br/><br/><label>Dewey Class. No.: </label>I:8wM91, L8