Lofmark, C. J., Dutton, C. B., O'Brien, A. P., Moran, M., MacDonald, J. R., & Irish Self-Determination League of Great Britain. (1924). Correspondence of the Central Irish Self-Determination League Branch (London) with branches, with letters from C. B. Dutton to Art Ó Briain, reporting on his meetings with Henry Dixon and Mary MacSwiney in Dublin.

Lofmark, Carl Johan, et al. Correspondence of the Central Irish Self-Determination League Branch (London) with Branches, with Letters from C. B. Dutton to Art Ó Briain, Reporting on His Meetings with Henry Dixon and Mary MacSwiney in Dublin. 1924.