1
Cyhoeddwyd: 2019.
2
Cyhoeddwyd: [2002]
Superior document: Title is part of eBook package: De Gruyter Iberoamericana Vervuert eBook Package Backlist 2000-2014
Links: Cael y testun llawn; Cover
3
Cyhoeddwyd: [2006]
Superior document: Title is part of eBook package: De Gruyter EDP Sciences Backlist eBook Package 2000-2013
Links: Cael y testun llawn; Cael y testun llawn; Cover