005930000a22001930004500003000900000005001700009264006200026100001900088710004500107245008800152300002700240490002800267041000800295650001700303650002000320650002300340650003000363500000600393PH-MaWHO20241108112716.0 aKenya : bAfrican Medical and Research Foundation,c1978. aMcCusker, Jane aAfrican Medical and Research Foundation. aEpidemiology in community health : a self-teaching manual for rural health workers. a1 v. (various pagings) aRural health series ; 9 aeng aEpidemiology aData collection aCommunity medicine aCommunity health services a1