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[Hanau]: Dausien, [1994]
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New York, NY [u.a.]: Golden Press, 1983
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Washington D.C.: National Geographic Soc., 1973
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Washington D.C.: National Geographic Soc., 1966
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Washington: United States Government Printing Office, 1946
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Washington: Government Printing Office, 1919
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Washington: Government Printing Office, 1901-1950