1
Cyhoeddwyd: [2019]
Superior document: Title is part of eBook package: De Gruyter DGBA Social Sciences 1990 - 1999
Links: Cael y testun llawn; Cael y testun llawn; Cover
2
Cyhoeddwyd: 1998.
Links: Cael y testun llawn
3
Cyhoeddwyd: 1991.
Superior document: Prevention and intervention in childhood and adolescence, 11
Links: Cael y testun llawn
4
Cyhoeddwyd: [2017]
Superior document: Title is part of eBook package: De Gruyter Bristol UP/Policy Press Complete eBook-Package 2017
Links: Cael y testun llawn; Cover
5
Cyhoeddwyd: [2019]
Superior document: Title is part of eBook package: De Gruyter DGBA Social Sciences - <1990
Links: Cael y testun llawn; Cael y testun llawn; Cover
6
Cyhoeddwyd: [2011]
Superior document: Title is part of eBook package: De Gruyter DGBA Social Sciences 1990 - 1999
Links: Cael y testun llawn; Cael y testun llawn; Cover
7
Cyhoeddwyd: [2019]
Superior document: Title is part of eBook package: De Gruyter DGBA Social Sciences 1990 - 1999
Links: Cael y testun llawn; Cael y testun llawn; Cover
8
Cyhoeddwyd: [2010]
Superior document: Title is part of eBook package: De Gruyter DGBA Social Sciences 1990 - 1999
Links: Cael y testun llawn; Cael y testun llawn; Cover
9
Cyhoeddwyd: [2017]
Superior document: Title is part of eBook package: De Gruyter DGBA Law - <1990
Links: Cael y testun llawn; Cael y testun llawn; Cover
10
Cyhoeddwyd: [2011]
Superior document: Title is part of eBook package: De Gruyter DGBA Social Sciences 1990 - 1999
Links: Cael y testun llawn; Cael y testun llawn; Cover