Mining : Natural Resources Development
 Artikel Jurnal
Banks, Ferdinand E.
The economics of natural resources
Plenum Press, 1976
 Buku Teks SO
Natural resources and international development
edited by Marion Clawson
John Hopkins Press, 1965
 Buku Teks
The economics of natural resources depletion
edited by D.W. Pearce with the assistance of J. Rose
Macmillan, 1975
 Buku Teks
Natural resources and development
Federal Republic of Germany, 1977
 Buku Teks SO