Twitchell, K.S.
Saudi Arabia, with an account of the development of its natural resources / by K.S. Twitchell, with the collaboration of Edward J. Jurji
Princeton University Press, 1953
Buku Teks
Twitcheil, K.S.
Saudi Arabia with an account of the development of its natural resources with the collaboration of and
New Jersey Princeton Univ. 1958
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Natural resources and development
Federal Republic of Germany, 1977
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Natural resources and international development
edited by Marion Clawson
John Hopkins Press, 1965
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Mining : Natural Resources Development
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