1
Cyhoeddwyd: 2012.
Superior document: Post 45
2
Cyhoeddwyd: c2012.
Superior document: The history of communication
3
Cyhoeddwyd: [2015]
Superior document: Title is part of eBook package: De Gruyter EBOOK PACKAGE COMPLETE 2015
Links: Cael y testun llawn; Cover
4
Cyhoeddwyd: [2021]
Superior document: Title is part of eBook package: De Gruyter University of Texas Press eBook-Package Backlist 2000-2013
Links: Cael y testun llawn; Cael y testun llawn; Cover
5
Cyhoeddwyd: [2013]
Superior document: Title is part of eBook package: De Gruyter DGBA Backlist Complete English Language 2000-2014 PART1
Links: Cael y testun llawn; Cael y testun llawn; Cover
6
Cyhoeddwyd: [2016]
Superior document: Title is part of eBook package: De Gruyter New York University Press Complete eBook-Package 2016
Links: Cael y testun llawn; Cael y testun llawn; Cover
7
Cyhoeddwyd: [2016]
Links: Cael y testun llawn; Cael y testun llawn; Cover