Brown, G.C., author
The inaccessible earth
George Allen and Unwin, 1981
 Buku Teks
Brown, G.C., author
The Inaccessible earth
Allen & Unwin, 1981
 Buku Teks
Press, Frank, author
Earth
W H Freeman , 1974
 Buku Teks
Investigating the earth
Houghton Mifflin, 1967
 Buku Teks
Knapp, B.J., author
Earth and man
George Allen and Unwin, 1982
 Buku Teks
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