(1928). The history of Nations: Norway, Sweden and Denmark. P. F. Collier & Son Co..
Tohutoru Kātū Chicago (17th ed.)The History of Nations: Norway, Sweden and Denmark. New York: P. F. Collier & Son Co., 1928.
Tohutoro MLA (9th ed.)The History of Nations: Norway, Sweden and Denmark. P. F. Collier & Son Co., 1928.
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