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_aPaul Langevin. _eCorrespondance |
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_aLeipzig _d15/11/1930 |
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| 300 | _aEn-tête: Physikalisches Institut der Universitaet Leipzig | ||
| 307 | _aLettre | ||
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_aDeby _bP. ? _4070 |
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_aLangevin _4660 |
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