Mexico. Lot (4 books) : two of them auction catalogues: David Feldman All World Collections & Large lots Select single lots / Mexico Specialised (Geneva 2010) ; Sothevys The Erich King Collection of the 19. And 20. Century Stamps and Covers of Mexico (New York 1995) ; Hartmann, R., markets in the old Peru, Bonn 1968 (Disertation) ; Schmitz, o. The finances Mexikos. Leipzig 1894. ;