Congressional Hearings 1909; Col. Goethals testimony; p.15 [1] Accessed 26 Dec 2011 ↑ The Chief Engineers of the Panama Canal Accessed 7 Jan 2012 ↑ My Dear Bishop...
Tübingen (Germany), col. 1357 ↑ M. Elze, Grotius, Hugo, in Die Religion in Geschichte und Gegenwart, 3. Auflage, Band II (1958), col. 1885 ↑ H. Hohlwein...