Mittermeier, Russell A., author
Cemex Conservation International, 1999
Buku Referensi
Mealey, George A., author
Freeport-McMoran Copper & Gold, 1996
Buku Teks
Newman, Arnold
Fact on File, 1990
Buku Teks
Barbour, Michael G., author
The Benjamin/Cummings , 1987
Buku Teks
Basaltic Volcanism Study Project
Pergamon Press, 1981
Buku Referensi