00345nam a22001457a 4500020001500000082001300015100001900028245004200047250000800089260002600097300001100123650002300134654002300157700001900180  a0815107544  a613bBER  aBerg, Alfred O  a1996 The year book of family practice  aNil  aSt.LouisbMosbyc1996  a554 p.  aCommunity Medicine  aCommunity Medicine  aBerg, Alfred O