1
2
Cyhoeddwyd: [2022]
Superior document: Title is part of eBook package: De Gruyter Lynne Rienner Press Complete Archive eBook-Package Pre-2000
Links: Cael y testun llawn; Cael y testun llawn; Cover
3
Cyhoeddwyd: 1987.
Links: Cael y testun llawn
4
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
5
Cyhoeddwyd: [1981]
Superior document: Title is part of eBook package: De Gruyter Columbia University Press eBook-Package Archive 1898-1999
Links: Cael y testun llawn; Cael y testun llawn; Cover