Camp, William G.
Managing our natural resources
Delmar, 1997
Buku Teks SO
Mining : Natural Resources Development
Artikel Jurnal
Natural resources and international development
edited by Marion Clawson
John Hopkins Press, 1965
Buku Teks
Natural resources and development
Federal Republic of Germany, 1977
Buku Teks SO
Twitchell, K.S.
Saudi Arabia, with an account of the development of its natural resources
Princeton University Press, 1953
Buku Teks SO