1
Published: 1993
Superior document: Population studies; 26 26
2
Published: 1991
Superior document: Population studies 23
3
Published: 2003
Superior document: Enthalten in Major trends affecting families ; prepared by the Programme on the Family New York, NY, 2003 S. 1 - 26 Economic Social Affairs
4
Published: 1994
Superior document: CBGS-monografieën 1994,2
5