TY  - BOOK
AU  - Prasad, R.
TI  - 21 vem sadi ka vigyan khagol vigyan
U1  - 491.43 Q0 
PY  - 2010///
CY  - New Delhi
PB  - Vaniprakasan
KW  -  R.Prasad and Devendraprasad Varma
KW  - Varma, Devendraprasad,jt.auth
KW  - Hindi
ER  -