Hennig Philatelic Notices, VI. Year, 1925, issue 12, there...

Hennig Philatelic Bulletins, VI. Jg., 1925, Issue 12, including Birnbach Hannover Part II, 'The 5 Mark stamp with the princely group of the Reichspost' (without author mention) and 'Foreign stamps on Brunswick stamps and Brunswick stamps on foreign stamps' by W. Schrader, each with illustration, the cover slightly stained, otherwise good #47778