[Investigation on failures in reporting infants' death in 1981 in Congqing County].
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D002681:China; D005260:Female; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D008297:Male; D012042:Registries; D013997:Time Factors