Merriam-Webster's Dictionary and Thesaurus
Merriam-Webster
A First Course in Mathematical Physics
Colm T. Whelan
Principles of Mathematical Modeling
Clive L. Dym & Elizabeth S. Ivey
Encyclopedia of Social Psychology
Roy F. Baumeister & Kathleen D. Vohs
What Are Subtle Energies - Article
William A. Tiller
Political Writings
John Locke