O'Brien, A. P., McMahon, W. S. F., Lavery, J., Kelly, P., & Dutton, C. B. (1921). A few statements of Art Ó Briain to the Irish Self-Determination League regarding the proposed World Conference of the Irish Race in Paris, with correspondence of Ó Briain relating to queries sent to him by Katherine Hughes and the desire of Sir John Lavery to exhibit at the World Conference.

O'Brien, Art Patrick, et al. A Few Statements of Art Ó Briain to the Irish Self-Determination League Regarding the Proposed World Conference of the Irish Race in Paris, with Correspondence of Ó Briain Relating to Queries Sent to Him by Katherine Hughes and the Desire of Sir John Lavery to Exhibit at the World Conference. 1921.