Pandey, S. N. Misra, S. P.  Trivedi, P. S.  <br/><br/>
A textbook of botany Vol.2 :  Bryophyta, pteridophyta, gymnosperms and palaeobotany / 
by  S. N. Pandey, S. P. Misra and P. S. Trivedi 
 - 8th ed. 
 - New Delhi :  Vikas Publishing House Pvt. Ltd. ,  1982 . 
 - 526 p.  Hard Back 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany<br/>Riccia<br/>Porella
<br/><br/><label>Dewey Class. No.: </label>580   / PAN-T V.2