edited by Frantisek Sedlacek and Christine Waiblinger-Jens
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International Geophysical Conference and Exposition
Indonesian Association of Geophysicists (HAGI), 1996
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Fenwick, Charles G.
Appleton-Century-Crofts, 1948
Buku Teks
Wallace, Rebecca M. M.
Sweet & Maxwell, 1997
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Carter, Barry E.
Aspen Law & Business, 1999
Buku Teks