Le Roux, L. N., O'Brien, A. P., & Ó Ceallaigh, S. T. (1931). Correspondence of Art Ó Briain with Louis N. Le Roux, French journalist, about the history of the Irish Republican Brotherhood and the roles of Cathal Brugha, Bulmer Hobson and Patrick Pearse, with a letter to Seán T. Ó Ceallaigh from Ó Briain and reply.

Le Roux, Louis N., et al. Correspondence of Art Ó Briain with Louis N. Le Roux, French Journalist, About the History of the Irish Republican Brotherhood and the Roles of Cathal Brugha, Bulmer Hobson and Patrick Pearse, with a Letter to Seán T. Ó Ceallaigh from Ó Briain and Reply. 1931.