TY  - BOOK
AU  - VERMA, V.
AU  - VERMA, V.,
AU  - MATHUR, N. P.
TI  - PRACTICAL BIOLOGY (FOR CLASS XII)
U1  - 570 VER 
PY  - 1989///
CY  - NEW DELHI
PB  - S.CHAND & COMPANY
KW  - Life sciences biology
ER  -