000 00302nam a2200109Ia 4500
008 220809s2009 xx 000 0 und d
041 _aeng
245 _aAmerican journal of public health vol-99,No-1-4,jan-april 2009
260 _c2009
520 _aBack Volume
650 _aCommunity Medicine (614.44)
999 _c164423
_d164423