Arneson, Ben A.
The Democratic Monorchies of Scandinavia
D.Van Nostrand Company, 1938
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Innes, Hammond, 1913-
Scandinavia
Time Inc., 1963
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Potgieter E. J.
Albert
W.E.J Tjeenk Willink, 1914
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Scandinavia : between East and West
edited by Henning Friis
Cornel University Press, 1950
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Jennings, Ivor, Sir, 1903-1965
Constitutional laws of the commonwealth; Vol. 1 : the monarchies
Clarendon Press, 1957
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