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_2eng _aeng |
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| 082 | _aZ:26730x.N89, M9/SC | ||
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_aKAUFER Erich _9282271 |
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_cKAUFER Erich; SCHERER F M _aEconomics of the patent system |
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_aLondon _bHarwood academic publishers _c1989 |
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