His Plain talk about the Protestantism of to-day, 1868 t.p. (Mgr. Segur)
LC database, Mar. 8, 2003 (hdg.: Ségur, Louis Gaston de, 1820-1881; usage: abbé de Segur; M. de Segur; Mgr de Ségur; hdg.: Ségur, Louis Gaston Adrien de, bp., 1820-1881 [from old catalog])
MWA/NAIP files (hdg.: Ségur, Louis Gaston de, 1820-1881; usage: Louis Gaston de Ségur; Mgr. Segur; Mgr. de Ségur; L.G. de Ségur; G. de Ségur; Ségur; abbe de Ségur; Monseigneur de Ségur)
The Catholic Encyclopedia, 1913 (Ségur, Louis Gaston de; prelate and French apologist; b. 4/15/1820; d. 6/9/1881)