Founded November 1, 1964, in East Lansing, Michigan.
Founded February 4, 1948, in Lafayette, Indiana.
Founded January 25, 1992, in Geneseo, New York.
Founded April 30, 1989, in New Paltz, New York.
Founded at Cornell University on March 25, 1917 as a sorority which would respect the individuality of its members, especially religious minorities. SDT is a member of the National Panhellenic Conference.
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