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000001363 001__ 1363 000001363 005__ 20160222141727.0 000001363 037__ $$aSIDCimport-1647 000001363 100__ $$aClette, F. 000001363 245__ $$aThe International Sunspot Index Ri: A perspective on the last 50 years 000001363 260__ $$c2012 000001363 269__ $$c2012-04-xx 000001363 594__ $$aSTCE 000001363 773__ $$tUS Space Weather Workshop, Boulder, 27/4/2012 000001363 906__ $$aInvited 000001363 980__ $$aCTALKINVI