(1928). The history of Nations: Norway, Sweden and Denmark. P. F. Collier & Son Co..
Chicago-čujuhus (17. p.)The History of Nations: Norway, Sweden and Denmark. New York: P. F. Collier & Son Co., 1928.
MLA-čujuhus (9. p.)The History of Nations: Norway, Sweden and Denmark. P. F. Collier & Son Co., 1928.
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