Source: Undetermined United States Government Agency
Source: CIA - Central Intelligence Agency
Source: INETER - Instituto Nicaragüense de Estudio Territoriales
Source: U.S. Geological Survey and U.S. Customs Service
Source: U.S. Central Intelligence Agency
The Unification of Germany. III. The North German Federation and the German Empire 1866-1871.
Source: The Historical Atlas by William R. Shepherd, 1926
Second voyage of Christopher Columbus in 1493
Source: Agence de Promotion de l'Industrie
"Philippine Islands Map Showing Principal Mineral Districts" from Diplomatic and Consular Reports; Annual 4369 - 4387, 1908 Vol. 7; edited at the Foreign Office and the Board of Trade. London 1909.
Source: Foreign Office and the Board of Trade. London 1909
Municipalities of the Province of Huesca 2003