TY  - BOOK
AU  - Rashid,A., x
AU  - x
TI  - An introduction to pteridophyta (diversity and differentiation): x
SN  - x
U1  - 587/R227i 
PY  - 1991///
CY  - New Delhi
PB  - Vikas Pub.
KW  - Pteridophyta
KW  - Boston
N1  - Includes
ER  -