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21by Poincaré Henri
Gauthier-Villars 1951Book -
22Ed. J. Gabay 1995Book
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23Editions Jacques Gabay DL 1993Book
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24Editions Jacques Gabay DL 1992Book
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25Editions Jacques Gabay impr. 1991, cop. 1991Book
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26Editions Jacques Gabay DL 1993Book