A Brief Introduction to Piaget
Nathan Isaacs
George Washington Papers, Series 2, Letterbooks 1754-1799
Manuscript Division, Library of Congress.
The Dante Encyclopedia
Richard H. Lansing
The World Turned Upside Down
David Drake & Eric Flint & Jim Baen
The Oxford Handbook of the History of International Law
Bardo Fassbender & Anne Peters & Simone Peter & Daniel Högger
Dream Symbols Dictionary
Ed Traut