DEVELOPMENT OF NONFERROUS METALLURGY IN BULGARIA by A. S. Nikol'skiy -- UTILIZATION OF NATURAL GAS IN POLISH METALLURGICAL INDUSTRY by Dr. Engr. Jan Mikulski -- SAVING OF MATERIALS AS A CONDITION FOR UPGRADING THE ENTIRE ECONOMIC ACTIVITY -- BETTER UTILIZATION OF NATURAL RESOURCES AS AN IMPORTANT OBJECTIVE IN THE PROMOTION OF IMPROVED ECONOMIC EFFECTIVENESS by Al. Puiu -- IMPROVED PROFITABILITY IN THE RUMANIAN PETROCHEMICAL INDUSTRY by S. Diamandescu.
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