Bir, S S, ed. <br/><br/>
Pteridophytes: Their morphology, cytology, taxonomy and phylogeny 

 - New Delhi  Today & Tomorrow  1983 
 - viii, 253 p. 
<br/><br/><label>ISBN: </label> RS95 
<br/><br/><label>Dewey Class. No.: </label>587 B53P