https://www.loc.gov/collections/sigmund-freud-papers/
The online collection, with more than 20,000 items, contains the personal papers of Sigmund Freud (1856-1939), the neurologist and founder of psychoanalysis whose ideas of the unconscious and theories on sex, repression, transference and religion profoundly influenced 20th-century Western thought. His theories still generate controversy. (https://www.loc.gov/item/prn-17-005/)
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