foto: By Figure 1.1 (page 8) of: Frith U (1991). "Asperger and his syndrome". In Frith U (ed.). Autism and Asperger syndrome. Cambridge University Press. pp. 1–36. ISBN 0-521-38608-X. The source's caption says the photograph is "From the collection of Dr Maria Asperger-Felder". The book is copyright 1991 by Cambridge University Press., Fair use, Link, By Bundesarchiv, Bild 152-04-28 / Friedrich Franz Bauer / CC-BY-SA 3.0, CC BY-SA 3.0 de, Link