Casson, Herbert N.
What makes values/By Herbert N. Casson
London The Efficiency Maya time [date of publication not identified],
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Jahrbuch des museums fur volkerkunde zu Leipzig
Berlin Akedemie [t.th.]
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Gao, Zhiguo
International petroleum contracts: current trends and new directions/Zhiguo Gao
London Graham & Trotman 1994,
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Brand, W.
Struggle for a higher standart of living the problem of the underdeve/W.Brand/loped countries
Free Press, 1958
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Geografi negara berkembang
Dickenson, J.P... [et.al.]
Methuen, 1983
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