R. Frank

发表

J. Klein, R. Frank, Stanley Bailis, 1988 .

R. Frank, Roberta Frank, Angus Cameron, 1973 .

R. Frank, C. Chase, 1997 .

R. Frank, 2019, Dating Beowulf.

R. Frank, 2018, Anglo-Saxon England.

R. Frank, 2019, Old Norse-Icelandic Literature.