CRC Concise Encyclopedia of Mathematics
Eric W. Weisstein
Saint Thomas and the Gentiles Aquinas Lecture ; 1938
Mortimer Jerome Adler
Assessing Languages for Specific Purposes
Dan Douglas
Goal-Directed Proof Theory
Dov M. Gabbay & N. Olivetti
Philosophy in a New Century: Selected Essays
John Rogers Searle
An Essay on the Principle of Population
Thomas Malthus