TY - JOUR A1 - Gerster, Mette A1 - Keiding, Niels T1 - Biological and sociological interpretations of age-adjustment in studies of higher order birth rates Y1 - 2008 DO - 10.4054/DemRes.2008.19.31 JF - Demographic Research VL - 19 IS - 31 SP - 1205 EP - -1216 ER -