TY  - GEN
AU  - Purang , Y. P.
AU  - Saxsena , S.P. 
AU  - Purang , Aditi 
TI  - Experimental biology: For class xii
U1  - 570.724 
PY  - 1989///
CY  - New Delhi
PB  - Frank brothers and co.
KW  - OPTIONAL EXPERIMENTS
KW  - ACTIVITIES
KW  - EXPERIMENTAL BIOLOGY
KW  - LABORATORY WORK
KW  - BIOLOGY
ER  -