Citations: Howard, L. O. 1930: History of applied Entomology (Somewhat Anecdotal). Smithsonian Miscellaneous Collections, Washington 84, S. X+1-564, B15: 1018, pp. (Taf. 39)
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. nur Portr.(Taf. 8, 44)
Poggi, R.; Conci, C. 1996: [Giffard, W. M.] Memorie della Società Entomologica Italiana, Genova 75, B15 10160a, pp. 54 (Sammlungsverbleib)