REMOVE

1. North Dakota
2. Williams W.

WHAT

1. Atlas Map (1)
2. National Atlas (1)

WHERE

1. Colorado (1)
2. Montana (1)
3. South Dakota (1)
4. Wyoming (1)

WHO

1. Gamble, W.H. (1)
2. Mitchell, Samuel Augustus … (1)
3. Ziegler & McCurdy (1)

WHEN

1. 1874 (1)