[PROPOSAL FOR A PUNCHED-CARD SURVEY METHOD FOR FERTILITY STUDIES].
D003625:Data Collection; D005298:Fertility; D006296:Health Services; D006801:Humans; D008403:Mass Screening; D011676:Punched-Card Systems
FERTILITY; MASS SCREENING; PUNCHED-CARD SYSTEMS
VORSCHLAG FUER EINEN LOCHKARTENGERECHTEN ERHEBUNGSBOGEN FUER FERTILITAETSUNTERSUCHUNGEN.