1. Map of area in dispute between Belgium and Germany. Yale Public content 1910. 2013-02-05T20:08:10Z. 2018-12-10T16:52:49Z. s.n. English. Public. Belgium, Germany, and Luxembourg.
2. [Netherlands-Belgium border region]. Yale Public content 1940. 2002-12-03T13:53:06Z. 2021-05-05T21:40:30Z. s.n. German&Dutch. Public. Netherlands and Belgium.