Carroll, Henry K. The Religious Forces of the United States, Enumerated, Classified, and Described on the Basis of the Government Census of 1890. With an Introduction on the Condition and Character of American Christianity. American Church History series, vol. 1. New York: Christian Literature Co., MDCCCXCIII. 449 p.
Carroll, Henry K. Report on Statistics of Churches in the United States at the Eleventh Census: 1890. Washington: Government Printing Office, 1894. 812 p.