006290000a22001810004500003000900000005001700009562002100026110007700047245006100124264004000185300003800225490003300263500008200296041000800378650002900386650002100415040001100436PH-MaWHO20241108112536.0  aST/ESA/SER.A/107  aUnited Nations. Department of International Economic and Social Affairs.  aStep-by-step guide to the estimation of child mortality.  aNew York : bUnited Nations,c1990.  a83p.+ 1 booklet in pocket at end.  aPOPULATION studies ; no.107.  aAccompanied by:QFIVE : United Nations program for child mortality estimation.  aeng  aData collectionxMethods  aInfant mortality  aWHOLIS