A Swiss cocoa dynasty in Brazil : The astonishing story behind Philipp Keller’s photos of Brazil (ca. 1875-1950)
Hans Erni Museum Lidostrasse 5, Luzern, LUA Swiss cocoa dynasty in Brazil. The astonishing story behind Philipp Keller's photos of Brazil (ca. 1875-1950) with Michael Schmitz (University of Lausanne). How did the oldest known photos of …