000 00472nam a2200169Ia 4500
008 160906s9999 xx 000 0 und d
100 _aHelbig, Donald W
100 _aWishik, Samuel M
110 _aColumbia University
245 _aFertility pattern method
245 _bEstimation of fertility change by retrospective quasi-cohort
260 _aNew York
260 _bColumbia University
260 _c1972
300 _aiv, 83
440 _aManual Number Series 5
999 _c97952
_d97952