TY  - BOOK
AU  - SHARMA,O.P.
TI  - Textbook of pteridophyta
SN  -  333909828
U1  - 587 
PY  - 1990///
CY  - New Delhi
PB  - Macmillan
KW  - Pteridophyta
KW  - Botany
N1  - Includes index
ER  -