TY  - BOOK
AU  - NCERT
TI  - Biology: science for middle schools 
U1  - 570 
PY  - 1967///
CY  - New Delhi
PB  - NCERT
KW  - Biology
N1  - Pt.1 : 1973
Pt.2 : 1975
Pt.3 : 1973; Pt.1 : 1973
Pt.2 : 1975
Pt.3 : 1973
ER  -