Merriam-Webster's Dictionary and Thesaurus
Merriam-Webster
The Salvia divinorum Research and Information Center
Research Information Center
BioShock and Philosophy: Irrational Game, Rational Book
Luke Cuddy
The Arthurian Tradition
John Matthews
Encyclopedia of Human Geography
Barney Warf
Team of Rivals: The Political Genius of Abraham Lincoln
Doris Kearns Goodwin
The Writings of Abraham Lincoln - Volume 1: 1832-1843
Abraham Lincoln
The Writings of Abraham Lincoln - Volume 2: 1843-1858