Guelzo, Allen C. (Personal Name)

Making God's word plain, c1979 (a.e.) t.p. (Allen C. Guelzo)

His Edwards on the will, 1989, c1988: CIP t.p. (Allen C. Guelzo) data sheet (b. Feb. 2, 1953)

Amazon. com, Oct. 31, 2008 (His Lincoln and Douglas, 2008, about the author: Henry R. Luce Professor of the Civil War Era, Gettysburg College)

U.S. copyright file, Oct. 31, 2008 (Guelzo, Allen Carl, 1953- )

Digital dissertations, Oct. 31, 2008 (Guelzo, Allen Carl, Ph. D., University of Pennsylvania, 1986--The unanswered question)