19th CENTURY PRIVATE CITY POSTS

A18.01 Die Deutsche Privatpost, Vol. III by H. Meier zu Eissen, 1991, 494p.
A18.02 Die Deutsche Privatpost, Vol. IV by H. Meier zu Eissen, 1997, 537p.
A18.03 Handbuch der Deutschen Privatpostwertzeichen by C. Schmidt, Vol. I, Stamps, 1939. (A very authoritative treatment of the private posts).
A18.04 Handbuch der Deutschen Privatpostwertzeichen by C. Schmidt, Vol. II, Stamps, 1939. (A very authoritative treatment of the private posts).
A18.05 Die Marken der Hamburger Boten - Institute by J. Dieks

 

19th CENTURY PRIVATE CITY POSTS Clippings

A18.500CL Betrachtungen zur Privatposten Mannheim, clipping, 6p.
A18.501CL The German Privatposts II - Berlin / The German Privatposts III - Overprints by P. Greenlaw, clippings from Global Stamp News, Feb. / March 2004.