The Kentucky Rifle Association "The Kentucky Rifle: A True American Heritage in Picture" (1967); Joe Kindig, Jr. "Thoughts on the Kentucky Rifle in Its Golden Age" (1960): Russell E. Harriger "Longrifles of Pennsylvania Vol 1" (1984); Henry J. Kauffman "The Pennsylvania-Kentucky Rifle" (1960); John D. Baird "Hawken Rifles: The Mountain Man's Choice" (1976): Stuart E. Brown, Jr. "The Guns of Harpers Ferry" (1968).