3583 20200213145137.0 CTALK-2018-0067 Lefèvre, L. The Sunspot Number Revision and Recalibration: an ongoing effort 2018 2018-07-16 STCE Clette, F. COSPAR, Pasadena, CA laure.lefevre@observatoire.be http://cdsads.u-strasbg.fr/abs/2018cosp...42E1974L. Invited CTALKCONT