000 00304nam a2200109Ia 4500
008 211214s9999 xx 000 0 und d
040 _cJayakar Knowledge Resource Centre
100 _aGhosh, Birendra Nath.
245 0 _aHygine & Public Health.
260 _bScientific P. Co.
_aCalcutta
_c1930
942 _c1
999 _c15419
_d15419