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Gilbert, P. 2007: A Source Book for Biographical Literature on Entomologists Leiden, Backhuys Publishers, 694 S., A 2972, pp. 13
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. 124