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4. Die Sudetenländer nach dem 20. November 1938 [cartographic material]. Yale Public content 1938. 2003-01-16T12:54:31Z. 2018-09-05T19:42:30Z. Velhagen & Klasing (Firm). Velhagen & Klasing. German. Public. Sudetenland (Czech Republic).
5. [Northeast France and Belgium]. Yale Public content 1916. 2011-10-14T20:08:15Z. 2020-06-28T23:00:45Z. Velhagen & Klasing (Firm). Velhagen & Klasing. German. Public. France and Belgium.