TY - BOOK ID - 128065021 TI - Fecundity, fertility and family planning. PY - 1970 PB - Gothenburg : Demographic Institute, University of Gothenburg, DB - UniCat KW - Fertility, Human KW - Mathematical models. UR - https://www.unicat.be/uniCat?func=search&query=sysid:128065021 AB - ER -