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when toggle format what by license comment
Sep 9, 2018 at 3:50 vote accept jason
Sep 9, 2018 at 3:50
May 30, 2018 at 3:24 comment added jason Thank you so much!! I will read the book you recommend( I am sorry I do not know French). Thanks a lot!!
May 29, 2018 at 7:32 history answered RaphaelB4 CC BY-SA 4.0