1
Cyhoeddwyd: [2017]
Superior document: Title is part of eBook package: De Gruyter Penn eBook Package Archive 1898-1999 (pre Pub)
2
Cyhoeddwyd: [2013]
Superior document: Title is part of eBook package: De Gruyter HUP e-dition: Complete eBook Package
Links: Cael y testun llawn; Cael y testun llawn; Cover
3
Cyhoeddwyd: [2012]
Superior document: Title is part of eBook package: De Gruyter DGBA Library Information Science 1990 - 1999
Links: Cael y testun llawn; Cael y testun llawn; Cover
4
Cyhoeddwyd: [2017]
Superior document: Title is part of eBook package: De Gruyter DGBA History 1990 - 1999
Links: Cael y testun llawn; Cael y testun llawn; Cover