Bibliography

Clark, M.K., 1979 (second printing), Titusville an illustrated history, commissioned by Titusville Area School District, Inter Collegiate Press, Mission, Kansas, 192 pp.

Kinnear, M., 1984, Information was obtained from the tribute plaque to Heisman in Titusville (quoted in text).

Sayer, J., 1999, Heisman was early innovator, The Derrick, Sept. 23, Oil City, Pa., on p. 13.

Sherman, J., Titusville, Pa., verbal communication.

Stewart, A.W., et al, 1995, John A. Mather, The legacy of Pennsylvania's oil region photographer, Colonel, Inc., Titusville, Pa., 60 pp plus appendix A, B, and C.

Stewart, A.W., unpublished notes, inventory of Heisman files at Crawford County, Pa., Historical Society.

Weber, D., Pleasantville, Pa., verbal information.

Other sources including S.T. Pees files.