1
Julkaistu: 1990
Superior document: Working papers / Population Council, Research Division 15
2
Julkaistu: 1998
Superior document: Working papers / Population Council, Policy Research Division 118
3
Julkaistu: 1995
Superior document: Working papers / Population Council, Research Division 77
4
5
Julkaistu: 1987
Superior document: Working papers / Population Council, Center for Policy Studies 135
6
Julkaistu: 1997
Superior document: Working papers / Population Council, Policy Research Division 93
7
Julkaistu: 1991
Superior document: Working papers / Population Council, Research Division 32