1
Cyhoeddwyd: 1979
Superior document: Working papers / Population Council, Center for Policy Studies 49
2
3
4
Cyhoeddwyd: 1982
Superior document: Working papers / Population Council, Center for Policy Studies 84
5
Cyhoeddwyd: 1991
Superior document: Working papers / Population Council, Research Division 27
6
Cyhoeddwyd: 1985
Superior document: Working papers / Population Council, Center for Policy Studies 114
7
Cyhoeddwyd: c1975.
Links: Cael y testun llawn
8
Cyhoeddwyd: [2011]
Superior document: Title is part of eBook package: De Gruyter DGBA Social Sciences - <1990
Links: Cael y testun llawn; Cael y testun llawn; Cover
9
Cyhoeddwyd: [2011]
Superior document: Title is part of eBook package: De Gruyter DGBA Social Sciences - <1990
Links: Cael y testun llawn; Cael y testun llawn; Cover