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Donald T. Campbell
American social scientist (1916–1996).
Born November 20th, 1916 in Grass Lake. [ref]
Died May 6th, 1996 at 79 years old in Bethlehem. [ref]
Occupations
non-fiction writer, psychologist, sociologist, university teacher
Wikipedia
A birth-date is a reminder to celebrate the life as well as to update the life. Amit Kalantri