What was the birth year of the son of Charles Frederick Menninger who died in 1990?
Charles Frederick Menninger: Charles Frederick Menninger (11 July 1862 – 28 November 1953) was a physician who co-founded the Menninger Foundation with his sons, Karl and William. Karl Menninger: Karl Augustus Menninger (July 22, 1893 – July 18, 1990) was an American psychiatrist and a member of the Menninger family of psychiatrists who founded the Menninger Foundation and the Menninger Clinic in Topeka, Kansas.
1893