Obsessive thoughts (intellectualization, obsessive ideation) were studied by S. Freud, as were compulsions. The former are related to isolation, fixed ideas, compartmentalization, and encapsulation but differ from intellectuality. Compulsions are related to obsessive acts, ritualizations, and undoing but differ from habit. Analagously, obsessive thoughts are to neuroses as delusions are to psychoses. Obsessive thoughts are related to the obsessive-compulsive syndrome and other syndromes. This bibliography, which ranges from the late 1920's to the middle 1960's focuses upon dynamics rather than syndromes. (Author)