000 00292nam a2200121 4500
020 _a0675088321
050 0 0 _aMED RA427
_bN4
100 1 _aNewton, David F.
245 1 0 _aElements of environmental health
260 _aColumbus, Ohio,
_bMerrill
_c1974
300 _avii, 327 p.
_bill.
942 _cBK
999 _c7726
_d7726