Arndt, K. J. R., Pitzer, D. E., & Chamness, L. A. (1992). George Rapp's disciples, pioneers and heirs: A register of the Harmonists in America. Evansville, Ind.: University of Southern Indiana Press.

Arndt, Karl John Richard., Donald E. Pitzer, and Leigh Ann Chamness. George Rapp's Disciples, Pioneers and Heirs: A Register of the Harmonists in America. Evansville, Ind.: University of Southern Indiana Press, 1992.

Arndt, Karl John Richard., Donald E. Pitzer, and Leigh Ann Chamness. George Rapp's Disciples, Pioneers and Heirs: A Register of the Harmonists in America. Evansville, Ind.: University of Southern Indiana Press, 1992.