Atlas of the world
Gedes & Grosset, 2003
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World atlas
University of Technology Sydney
Lovell Johns , 1996
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Atlas of the world
Rand McNally, editor
Time-Life Books, 1968
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World geographical encyclopedia 4: Europe
edited by Sybil P. Parker
McGraw-HIll, 1995
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World geographical encyclopedia 2: The Americas
edited by Sybil P. Parker
McGraw-HIll, 1995
 Buku Referensi