Lobo, V.M.M.
Elsevier, 1989
Buku Referensi
edited by Lee, William H.K. ... [and others]
Academic Press, 2003
Buku Referensi
Herbert, Anthony B.
Macmillan Publishing Co., 1983
Buku Teks
Hitchins, John B.
Banker Publishing Company , 1957
Buku Teks
Academic Press for International Association of Seismology and Physics of the Earth's Interior, 2003
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