Resources

Training for Ultras Edited by Andy Milroy publ. R.R.C.
The Outer Running and the Inner Running by Sri Chinmoy publ. by Oneness-Life Press 1986
Pioneer-Runners of Tomorrow's World-Peace-Dawn By Sri Chinmoy Publ. by Agni Press 1998
Running Through The Wall: Personal Encounters With the Ultramarathon by Neal Jamison. May 2003

Ultrarunning magazine
Running Times
Runners World

Runners Source - List of books and other resources mostly for beginner and up to the marathon distance