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_aBeckmann M Ed. _9128944 |
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| 245 | 0 | _aLecture notes in economics and mathematical systems | |
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_aBerlin _bSpringer Verlag _c1974 |
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_a102p. illus _ccm. |
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| 490 | _aLectures notes in operation research and mathematical systems ed by M Beckmann and H P Kunzi; 54 | ||
| 650 | _aECONOMICS | ||
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