Joe Ball: The Butcher of Elmendorf
The Encyclopedia of Serial Killers, by Michael Newton April 2000, Facts on File, Inc.; ISBN: 0816039798
Hunting Humans, by Michael Newton April 1992, Avon; ISBN: 0380763966
Encyclopedia of Serial Killers, by Brian Lane & Wilfred Gregg May 1995, Berkley Pub Group; ISBN: 0425152138
The Wild and Free Dukedom of Bexar, by Elton R. Cude 1978, Munguia Printers; F392 .B5 C83.
Austin Chronicle – Texas
San Antonio Light - Texas