Commerce and trade on the north Atlantic, 850 A.D. to 1350 A.D., including England, Ireland, Greenland, Scotland and Norway ...
Tonning, Ole,1884-
Minneapolis, Minn., Burgess Publishing Company,
1936.
Vita.
Mimeoprinted.
"The third or main part is complete, the first two are digests."
Thesis (Ph. D.)--University of Minnesota, 1935.
Bibliography: leaves 88-90.
Commerce