Publications of Place that refer to Buhler (1907). Tatsachen und Probleme zu einer Psychologie der Denkvorgange I. Über Gedanken.
Place, U. T. (1974-03-20). Lecture 20: Mental events, mental acts and imageless thoughts.(20/3/1974). Section 5
Mental events as the interface between a process and a state. Imageless thoughts. Our knowledge of our own mental events. The symbolic nature of thought
Download: Amsterdam lecture 20