1940s
Watts, May Theilgaard
1946
December 21 1974 – March 20 1975
March 21 – June 20 1966
October 26 1994
March 22 1996
Mittempergher, Lorenzo
September 21 1995
Weick, George T.
Jacobs, Karel
April 30 1996
Ware, George
May 24 1993
Milan, Jose
January 23 1989
Qiwen, Zhang