1
Cyhoeddwyd: 1976-1984
Superior document: Memoirs of the American Philosophical Society volume 114, [127], 161-162
2
3
Cyhoeddwyd: 1974
Superior document: Variorum reprints collected studies series 29
4
Cyhoeddwyd: 1948
Superior document: Publication / The Mediaeval Academy of America no. 50
5
6
Cyhoeddwyd: 1976
Superior document: The papacy and the Levant (1204-1571) Volume 1
7
8
Cyhoeddwyd: 1978
Superior document: The papacy and the Levant (1204-1571) Volume 2
9
Cyhoeddwyd: 1992
Superior document: Memoirs of the American Philosophical Society 201
10
Cyhoeddwyd: 1991
Superior document: Memoirs of the American Philosophical Society 192