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Katharine Cook Briggs and Isabel Briggs Myers extrapolated their MBTI theory from Carl Jung's writings in his 1921 book Psychological Types
Katharine Cook Briggs and Isabel Briggs Myers extrapolated their MBTI theory from Carl Jung's writings in his 1921 book Psychological Types
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Briggs in the early 20th century
Briggs in the early 20th century
Cook (left) with her daughter Isabel in an early 20th century photograph
Cook (left) with her daughter Isabel in an early 20th century photograph