TY  - BOOK
AU  - Vishnoi, H. S. Dr. 
AU  - Mukherjee, Susobhan
TI  - Concise  biology - I.C.S.E class ix: part - 1/ 
PY  - 2013///
CY  - New Delhi
PB  - Selina publishers
N1  - BIE501 & Biology Education
ER  -