Citations: Mockford, E. L. 1968: Obituaries. Ralph Langley Parker 1892-1968. Annals of the Entomological Society of America, Lanham/Maryland, S. 1631, B15: 10270, pp. 1631
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. 274, Portr. (Taf. 34)
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. 218, Portr. (Taf. 29)