This image is part of August Sander's project "Menschen des 20. Jahrhunderts" (People of the 20th Century), group IV, "Die Stände: Der Arzt und Apotheker" (The Social Classes: the Doctor and Pharmacist).
Lit.: Susanne Lange/Gabriele Conrath-Scholl (eds.). August Sander. Menschen des 20. Jahrhunderts (study volume). Munich 2001, ill. p. 139.
August Sander. Antlitz der Zeit. Munich 1990, ill. p. 106.