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World resources : energy, metals, minerals ; studies in economic and political geography
Alexandersson, Gunnar, (1978)
Mineral resources and their management
Blunden, John, (1985)
Die mineralischen Rohstoffe Afrikas - Chancen für die deutsche Wirtschaft : mit 18 Tabellen
Barth, Henner, (1996)
Strategic environmental policy and international competitiveness
Ulph, Alistair, (1996)
Modelling partially cartelised markets for exhaustible resources
Ulph, Alistair M., (1982)
World energy models : a survey and critique
Ulph, Alistair M., (1980)