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1de réir Buffa, Elwood S. (Elwood Spencer), 1923-Ábhair “...Operations research....”
Foilsithe / Cruthaithe 1977
LEABHAR -
2de réir Buffa, Elwood S. (Elwood Spencer), 1923-Ábhair “...Operations research....”
Foilsithe / Cruthaithe 1978
LEABHAR