1
Cyhoeddwyd: 1943
Superior document: Transactions of the American Philosophical Society N.S.,33,2
2
Cyhoeddwyd: 1968
Superior document: Memoirs of the American Philosophical Society 74
3
Cyhoeddwyd: [2019]
Superior document: Title is part of eBook package: De Gruyter Rutgers University Press Complete eBook-Package 2019
Links: Cael y testun llawn; Cael y testun llawn; Cover
4
Cyhoeddwyd: [2019]
Superior document: Title is part of eBook package: De Gruyter Cornell University Press Archive Pre-2000
Links: Cael y testun llawn; Cael y testun llawn; Cover