Five Practices for Orchestrating Productive Mathematical Discussion
Margaret S. Smith & Mary Kay Stein
Free Speech
Alan Haworth
Problems of Philosophy (1)
Begegnungen mit bemerkenswerten Menschen
Georges Ivanovich Gurdjieff
Who's Who in the Twentieth Century
Unknown
The Story of Philosophy
Will Durant
Developmental Psychology of Jean Piaget
John Hurley Flavell & Jean Piaget