DescriptionJuliusRobertMayervonFriedrichBerrer2.jpg Deutsch: JuliusRobertvonMayer Date 1868 Source http://clendening.kumc.edu/dc/ Author Friedrich Berrer
DescriptionJuliusRobertMayervonFriedrichBerrer.jpg Deutsch: JuliusRobertvonMayer Date 1868 Source taken from http://www.booksandthings.co.uk/Prints/meyer