MISRA, S.P. PANDEY, S.N. TRIVEDI, P.S. <br/><br/>
TEXTBOOK OF BOTANY, Volume II : BRYOPHYTA, PTERIDOPHYTA, GYMNOSPERMS AND PALEOBOTANY 

 - New Delhi  Vikas Publishing House Pvt. Ltd, New Delhi   1991 
<br/><br/><label>ISBN: </label>0 7069 5871 3 
<br/><br/><label>Dewey Class. No.: </label>580  / PAN/TE