1
Cyhoeddwyd: [2021]
Superior document: Title is part of eBook package: De Gruyter DG Plus DeG Package 2021 Part 1
Links: Cael y testun llawn; Cael y testun llawn; Cover
2
Cyhoeddwyd: [2009]
Superior document: Title is part of eBook package: De Gruyter Gorgias Press Backlist eBook-Package 2001-2013
Links: Cael y testun llawn; Cael y testun llawn; Cover