Borderlands United States Mexico -- See Mexican-American Border Region Here are entered works on those areas of the United States and Mexico adjacent to their common border. Works on the northern part of Mexico, including the states of Baja California, Baja California Sur, Chihuahua, Coahuila, Durango, Nuevo Leon, San Luis Potosi, Sinaloa, Sonora, Tamaulipas, and Zacatecas are entered under Mexico, North.
Borders Geography -- See Boundaries Here are entered works on boundaries in general. Works on boundaries of specific regions, countries, etc., are entered under the name of the place with the subdivision Boundaries. Works on the boundaries between two countries, etc., are entered under the name of each country with the subdivision Boundaries--[other country], e.g. United States--Boundaries--Mexico; Mexico--Boundaries--United States. --subdivision Boundaries under names of countries, states, etc.; and subdivision Territorial questions under individual wars, e.g. World War, 1939-1945--Territorial questions
