1898
Spurr, Josiah Edward
Aspen District Sheet.
Geologic Atlas
|
1898
Spurr, Josiah Edward
Tourtelotte Park Special.
Geologic Atlas
|
1898
Spurr, Josiah Edward
Tourtelotte Park Special.
Geologic Atlas
|
1898
Spurr, Josiah Edward
Tourtelotte Park Mining District Sheet.
Geologic Atlas
|
1898
Spurr, Josiah Edward
Aspen Mountain Sheet.
Geologic Atlas
|
1898
Spurr, Josiah Edward
Smuggler Mountain.
Geologic Atlas
|