A Piaget Primer: How a Child Thinks; Revised Edition
Dorothy G. Singer & Tracey A. Revenson
The Race to Save the Romanovs: The Truth Behind the Secret Plans ...
Helen Rappaport
Notes on Philosophy, Probability and Mathematics
Frank Plumpton Ramsey
The Philosophy of Physics
Roberto Torretti
Contemplation and Philosophy: Scholastic and Mystical Modes ...
Roberto Hofmeister Pich & Andreas Speer
Codes, Ciphers, and Secret Languages
Fred B. Wrixon