000 00426nam a22001457a 4500
008 170214b xxu||||| |||| 00| 0 eng d
060 _aWA100
_bM11
_2
100 _93960
_aMacMahon, B.
245 _aEpidemiology :
_bPrinciples and methods
_cBrian MacMahon and Thomas F.
260 _aUSA :
_bLittle , Brown and Company;
_c1970.
300 _a376 P. :
650 0 _9455
_aPublic Health
942 _2lcc
_cBK
999 _c3017
_d3017