Bib. nat. (hdg: Ruble, Baron Alphonse de; usage: Baron Alphonse de Ruble; Baron de Ruble)
Historie universelle par Agrippa dÁubigné, 1886-1909 v. 1, t.p. (baron Alphonse de Ruble)
LC database, Nov. 7, 1996 (hdg: Ruble, Alphonse, baron de, 1831-1898: usage: baron de Ruble; baron Alphonse de Ruble)
NUC pre-56 (hdg: Ruble, Alphonse, baron de, 1831-1898; usage: baron Alphonse de Ruble; baron de Ruble; Alphonse de Ruble; baron A. de Ruble; x-ref from De Ruble, Alphonse)