Bir, S.S.. <br/><br/>
Aspects of Plant Sciences, vol.6: Pteridophytes, their Morphology, Cytology, Taxonomy and Phylogeny /  

 - 1st ed /  
 - New Delhi :   today and tomorrpw's Printers & Publishers ,   1982 
 - viii, 253p ;  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany <Pteridophytes>
<br/><br/><label>Dewey Class. No.: </label>I4:2  / M3