REMOVE

1. Nebraska
2. Iowa
3. Walter, T.U.
4. Loven, C.E.

WHAT

1. Atlas Map (1)
2. Physical (1)
3. World Atlas (1)

WHERE

1. Bolivia (1)
2. Brazil (1)
3. Colombia (1)
4. Peru (1)
5. South America (1)

WHO

1. USSR (1)
2. USSR (Union of Soviet Soc … (1)

WHEN

1. 1967 (1)