Daelemans F. R.J. Lesthaeghe, The decline of Belgian fertility, 1800-1970. BMGN-LCHR [Internet]. 1981 Jan. 1 [cited 2024 Nov. 21];96(3):537-9. Available from: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-102458