REMOVE

1. Index to map of Central Amer …

WHAT

1. Central America--Index ma … (1)
2. Central America--Maps (1)
3. Costa Rica--Maps (1)
4. Nicaragua--Maps (1)

WHERE

1. México; Guatemala; Belize … (1)
2. W 92°15'--W 78°00'/N 19°0 … (1)

WHO

1. United States. Army Map S … (1)
2. United States. Army Map S … (1)
3. United States. Army. Engi … (1)

WHEN

1. 1929-1941 (1)