McGraw-Hill, 2003
Buku Referensi
McGraw-Hill dictionary of earth science
McGraw-Hill, 2003
Buku Referensi
Singleton, Paul, author
John Wiley & Sons, 2001
Buku Referensi
Lawrence, Eleanor
Prentice-Hall, 2000
Buku Referensi
McGraw-Hill, 2002
Buku Referensi