REMOVE

1. Mining
2. Leach, W.W.
3. Erdmann, Edvard
4. 1913

WHAT

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

WHERE

1. Arizona (1)
2. Montana (1)
3. New Mexico (1)
4. Utah (1)
5. Washington (1)

WHO

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

WHEN

1. 1967 (1)