TY  - BOOK
AU  - Verma, P.S
AU  - Agarwal, V.K
TI  - Biology
SN  - 9789355010285
U1  - 570 23rd ed.
PY  - 1980///
CY  - New Delhi
PB  - S. Chand 
KW  - SCIENCE, LIFE SCIENCE
ER  -