Natural resources and international developmnet/edited by Marion Clawson
Mass John Hopkins , 1965
Buku Teks
Gift of the Cotton maiden textiles of Flores and the Solor island
edited by Roy W. Hamilton
University of California, 1994
Buku Teks
Medieval age / edited by Angel Flores
Dell Publishing Co., 1963
Buku Teks
Mining : Natural Resources Development
Artikel Jurnal
The economics of natural resources depletion
edited by D.W. Pearce with the assistance of J. Rose
Macmillan, 1975
Buku Teks