TY  - BOOK
AU  - Bir,S.S.
TI  - Aspects of plant sciences: Pteridophytes 
U1  - 580.82 
PY  - 1980///
CY  - New Delhi
PB  - Today and Tomorrow's Printers and Publishers
KW  - Botany
KW  - India
N1  - Library has v.3; Includes bibliographical references and index
ER  -