Matches in Library of Congress for { ?s ?p Operations research.. }
- 97208700 subject "Operations research.".
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- 99029072 subject "Operations research.".
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- 99044531 subject "Operations research.".
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- a62009610 subject "Operations research.".
- a66007034 subject "Operations research.".
- 61016189 title "Operations research.".
- 66095202 title "Operations research.".