*Fred A. Leuchter Jr., "The Fourth Leuchter Report: An Engineering Evaluation of Jean-Claude Pressac's Book "Auschwitz: Technique and Operation of the Gas Chambers"" Hamilton, Ontario, History Buff Books and Video.
* Fred A. Leuchter Jr.,"The Fourth Leuchter Report: An Engineering Evaluation of Jean-Claude Pressac’s Book"Auschwitz: Technique and Operation of the Gas Chambers"Hamilton, Ontario, History Buff Books and Video.