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H. J. Zassenhaus had 7 appointments :

Committee of the Journal       1951 - 1953
C.J.M. Editorial Board (1949-1985)       1951 - 1959
Board of Directors       1953 - 1957
Publications Ad-Hoc Committees       1957 - 1957
C.J.M. - C.M.B. Specialized Editors       1957 - 1959
Vice-Presidents       1957 - 1961
Board of Directors       1979 - 1981