REMOVE

1. Series (Standard map series …
2. Mexico--Index maps
3. Series (Standard map series …
4. Mexico 1:250,000
5. North and Central America

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)