The primary resources for this article were the Santa Cruz Sentinel and the San Francisco Chronicle, dated between February 1973 and August 1973.
King, Brian. Lustmord: The Writings and Artifacts of Murderers. Burbank: Bloat Books, 1990
(This book has a preface written by Herb Mullin, and includes some of his letters and drawings.)
Lunde, Donald, and Jefferson Morgan. The Die Song. New York: Norton Books, 1980. (Out of print)
Lunde, Donald. Murder and Madness. New York: Norton Books, 1975. (Out of print)