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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
Donald_T._Campbell

There is still no cure for the common birthday. John Glenn