1
2
Cyhoeddwyd: 1988
Superior document: Working papers / Population Council, International Programs 22
3
Cyhoeddwyd: 1981
Superior document: Working papers / Population Council, International Programs 13
4
Cyhoeddwyd: 1984
Superior document: Working papers / Population Council, International Programs 20
5
6
Cyhoeddwyd: 1978
7
Cyhoeddwyd: 1980
Superior document: Working papers / Population Council, International Programs 10
8
9
Cyhoeddwyd: 1990
Superior document: Working papers / Population Council, Programs Division 2
10
Cyhoeddwyd: 1996
Superior document: Working papers / Population Council, Programs Division 9