REMOVE

1. Series (Standard map series …
2. Index map of Sierra Leone 1: …
3. Index map of Sierra Leone 1: …
4. Index map of Sierra Leone 1: …
5. Index map of Sierra Leone 1: …
6. United States. Army Map Serv …

WHAT

1. GSGS (Series) ; 4434 (1)
2. Index map of Sierra Leone … (1)
3. Index map of Sierra Leone … (1)
4. Series (Standard map seri … (1)
5. Sierra Leone--Index maps (1)

More 

WHERE

1. Africa (1)
2. Sierra Leone (1)
3. W 14º--W 10º/N 10º--N 7º (1)

WHEN

1. 1942- (1)