1
Cyhoeddwyd: c2010.
Links: Cael y testun llawn
2
Cyhoeddwyd: [2000]
Superior document: Title is part of eBook package: De Gruyter CVP eBook-Package Backfile 2000-2013
Links: Cael y testun llawn; Cael y testun llawn; Cover
3
Cyhoeddwyd: [2005]
Superior document: Title is part of eBook package: De Gruyter CVP eBook-Package Backfile 2000-2013
Links: Cael y testun llawn; Cael y testun llawn; Cover