The Knowledge Frontier: Essays in the Representation of Knowledge
Nick Cercone & Gordon McCalla
Cunningham's Encyclopedia of Crystal, Gem & Metal Magic
Scott Cunningham
Adjective Classes: A Cross-Linguistic Typology
R. M. W. Dixon
The Cathars: The Most Successful Heresy of the Middle Ages
Sean Martin
Dictionary of Alchemical Philosophy
Roger Caro & Kamala-Jnana & Pierre Deleuvre
Key Bible Concepts
David W. Gooding & John Carson Lennox