REMOVE

1. Washington
2. Northwest

WHAT

1. Geology (2)
2. Landforms (2)
3. Separate Map (2)
4. Atlas Map (1)
5. Chart Atlas (1)

WHERE

1. Idaho (2)
2. Oregon (2)
3. British Columbia (1)

WHO

1. Institute of Geographical … (2)
2. Raisz, Erwin (2)
3. Brand, T.S. (1)
4. Henderson, C.F. (1)
5. Mainwaring, C. (1)

WHEN

1. 1968 (2)
2. 1884 (1)
3. 1941 (1)
4. 1965 (1)