Knowledge Encyclopedia
Smithsonian Institution
Beyond Earth: A Chronicle of Deep Space Exploration, 1958-2016
Asif A. Siddiqi
Encyclopedia of Mathematical Physics
Jean-Pierre Francoise & Gregory L. Naber & Tsou Sheung Tsun
What Is Gnosticism?
Karen L. King
Defending Hypatia: Ramus, Savile, and the Renaissance Rediscovery ...
Robert Goulding
The Story of Philosophy: the Lives and Opinions of the Greater ...
Will Durant