Media type: Article Title: Aus der Geschichte der Optik : Hermann v. Helmholtz 1821-1894 Contributor: Maxam, Ulrich [Author] Published: 1980 Published in: Augenoptik ; 97(1980), 5 Language: German Keywords: Helmholtz, Hermann v. Origination: Footnote: Description: Umschlags. 2-3