000 00305nam a2200133Ia 4500
008 160710s1977 xx 000 0 und d
082 _a614 DUG
100 _aDUGGAL,K.N.
245 _aELEMENTS OF PUBLIC HEALTH ENGINEERING
250 _a2
260 _bS.CHAND
_c1977
300 _a386
942 _2ddc
_cB
999 _c39536
_d39536