000 00339nam a2200133Ia 4500
008 251112s9999||||xx |||||||||||||| ||und||
040 _aCNCLSA
100 _aAlferd Somers
_94174
245 0 _aAmerican Journal Of Epidemiology
260 _c1991
_bThe Johns Hopkins University
_aUSa
300 _aP.1-414
300 _bV.133
942 _cJRBV
999 _c26176
_d26176