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Učastie Pol'ši v razvitii toplivno-syr'evoj bazy
Chrynkevič, Ja., (1975)
East and West in the energy squeeze : prospects for cooperation ; relates to ...
Saunders, Christopher T., (1980)
Comecon oil and gas within the overall energy context
Zeman, Zbyněk A. B., (1977)