BEILBY M H. (1975). ECONOMICS AND OPRATIONAL RESEARCH. PITMAN PUBLICATIONS.
Chicago-čujuhus (17. p.)BEILBY M H. ECONOMICS AND OPRATIONAL RESEARCH. LONDON: PITMAN PUBLICATIONS, 1975.
MLA-čujuhus (9. p.)BEILBY M H. ECONOMICS AND OPRATIONAL RESEARCH. PITMAN PUBLICATIONS, 1975.
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