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| 100 | 1 | _aKratochvil, Egon | |
| 245 | 0 | 0 | _aCooperation on Patent Documentationen between industrial firms |
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_aPatentdokumentation _93575 |
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_aIndustrie _91985 |
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_aWPI. 2(1980),1,29-31. _wz_WPI |
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