The Basic Esoteric Dictionary is a product of the Henry T. Laurency Publishing Foundation. It includes over 500 entries on the terminology of Laurency.

Rice University’s Galileo Project provides a webpage with information on Galileo Galilei’s life and work.

University of Idaho professor J. Carl Michelsen maintains a web page on the philosophical works of G.W.F. Hegel.

The New Testament Gateway is a directory of online resources on the New Testament. Mark Goodacre, an associate professor of religious studies at Duke University, is creator and editor of the site.

Written by James Keith Elliott (Oxford University Press, 2005). Elliott provides translations and background on recently discovered apocryphal texts.

Published by P.J. Kenedy & Sons. The Official Catholic Directory is a guide to Catholic clergy in the United States and around the world.

Written by Alban Butler and Paul Burns (Liturgical Press, 1999). Butler and Burns write a revised guide to the history of the Catholic patron saints.

Written by Arthur J. Magida and Stuart M. Matlins (Jewish Lights Publishing, 1997). Magida and Matlins provide guidelines for visiting other faiths.

Published by Our Sunday Visitor (2012). The Catholic Almanac is a directory of Catholicism in the U.S. It is updated annually.