TY  - BOOK
AU  - Mahajan, B. K. .
AU  - Gupta, M. c.  .
TI  - Text book of Prcventive & Social Medicine
U1  - 614 
PY  - 1995///
CY  -  : 
PB  - Jaypee Barothers Med. , 
KW  - PSM
ER  -