Zitationen: Banks, N.; Schwarz, E. A.; Viereck, H. L. 1910: [Ulke, H.] Proc. Ent. Soc. Washington, 12, B15 10215, pp. 105-111
Mallis, A. 1971: American Entomologists. Rutgers Univ. Press New Brunswick, B15 A1642, pp. 258-260, Portr.
Osborn, H. 1937: Fragments of Entomological History Including Some Personal Recollections of Men and Events. 1 Columbus, Ohio, Published by the Author, 1-394 S., B15: 6024, pp. 231, Portr. (Taf. 26)
Osborn, H. 1952: A Brief History of Entomology Including Time of Demosthenes and Aristotle to Modern Times with over Five Hundred Portraits. Columbus, Ohio, The Spahr & Glenn Company, 1-303 S., B15: 6024a, pp. 230, Portr. (Taf. 27)
Skinner, H. 1910: [Ulke, H.] Entomological News and Proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia, Philadelphia 21, B15 10004, pp. 99-100