Citations: Anonym : [Engelhardt, G. P.] Bulletin of the Brooklyn Entomological Society, Lancaster, Pa. 38, B15: 10218, pp. 30-31
Anonym 1942: [Engelhardt, G. P.] Science 97, pp. 568
Gunder, J. D. 1930: [Engelhardt, G. P.] Entomological News , Philadelphia 41, B15 10004, pp. 1-3, Portr.
Mallis, A. 1971: American Entomologists. Rutgers Univ. Press New Brunswick, B15 A1642, pp. 335-336, Portr.
Osborn, H. 1946: Fragments of Entomological History Including Some Personal Recollections of Men and Events. 2 Columbus, Ohio, Published by the Author, 1-232 S., B15: 6024, pp. 80-81, Portr. (Taf. 12)
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., 6024a, pp. 191, Portr.(Taf. 53)
Tanner, V. M. 1942: Bibl. of Utah. The Great Basin Naturalist, Provo, Utah 3, S. 57-58
Teale, E. W. 1942: [Engelhardt, G. P.] Bulletin of the Brooklyn Entomological Society, Lancaster, Pa. 37, B15: 10218, pp. 153-157
Teale, E. W. 1942: [Engelhardt, G. P.] Bulletin of the Brooklyn Entomological Society, Lancaster, Pa. 43, B15: 10218, pp. 141-148
Torre-Bueno, J. R. de la 1942: [Engelhardt, G. P.] Bulletin of the Brooklyn Entomological Society, Lancaster, Pa. 37, B15: 10218, pp. 45
Torre-Bueno, J. R. de la 1943: [Engelhardt, G. P.] Annals of the Entomological Society of America, Columbus/Ohio 36, B15 10270, pp. 151