1
2
Cyhoeddwyd: [2019]
Links: Cael y testun llawn
3
Cyhoeddwyd: 2019.
4
Cyhoeddwyd: [2023]
Superior document: Title is part of eBook package: De Gruyter DG Plus DeG Package 2023 Part 1
Links: Cael y testun llawn; Cael y testun llawn; Cover
5
Cyhoeddwyd: [2023]
Superior document: Title is part of eBook package: De Gruyter DG Plus DeG Package 2023 Part 1
Links: Cael y testun llawn; Cael y testun llawn; Cover
6
Cyhoeddwyd: 2003
7
Cyhoeddwyd: [2021]
Superior document: Title is part of eBook package: De Gruyter DG Ebook Package English 2021
Links: Cael y testun llawn; Cael y testun llawn; Cover
8
Cyhoeddwyd: [2018]
Superior document: Title is part of eBook package: De Gruyter University of Toronto Press eBook-Package Archive 1933-1999
Links: Cael y testun llawn; Cael y testun llawn; Cover