000 00290pam a2200133 a 4500
020 _c
041 _h
082 _a614
_bSIN
100 _aSingh GPI .
245 _aMCQ Preventive and Social Medicine
_hTextual Documents
260 _bElsevier, Pub.
_c2009
300 _a365.
930 _a8985
999 _c8978
_d8978