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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 Dist …

Geologic Atlas

1898

Spurr, Josiah Edward

Aspen Mountain Sheet.

Geologic Atlas

1898

Spurr, Josiah Edward

Smuggler Mountain.

Geologic Atlas