REMOVE

1. Mexico 1:250,000
2. Series (Standard map series …
3. Mexico--Index maps
4. North and Central America
5. W 100º--W 90º/N 26º--N 20º …

WHAT

1. Index map of Mexico 1:250 … (1)
2. Mexico 1:250,000 (1)
3. Mexico--Maps, Topographic (1)
4. Series (Standard map seri … (1)

WHERE

1. Mexico (1)
2. W 100º--W 90º/N 26º--N 20 … (1)

WHO

1. United States. Army Map S … (1)

WHEN

1. 1947- (1)