found: Smith, Arthur Donaldson. Through unknown African countries, 1897: p. [447] (Dr. Karl Jordan)
found: LC manual cat. (hdg.: Jordan, Karl, 1861-)
found: British Museum Cat. (hdg.: Jordan, Heinrich Ernst Karl; usage: Dr. K. Jordan, Karl Jordan)
found: Who Was Who (London : Adam & Charles Black): vol. V, 1951-1960 (hdg.: Jordan, H.E. Karl; b. 7 Dec., 1861, Almstedt, Hanover; curator of Entomology, Zoological Museum, Tring, 1893-1939, director, 1930-1939; d. 12 Jan. 1959)
found: N.Y. Times Obituaries Index (d. 1959)
found: NUC Pre-1956 (gives date of death as 1954)
Jordan, Heinrich Ernst Karl, 1861-1959
