North Carolina Geological and Economic Survey (Classic Reprint)

Geological Survey of Ohio (Classic Reprint)

North Carolina Geological and Economic Survey (Classic Reprint)

Memoirs of the Geological Survey (Classic Reprint)

Geological Survey of Alabama (Classic Reprint)

Creation of a State Geological Survey, And (Classic Reprint)

The U. S. Geological Survey Program of 1995 (Classic Reprint)

Annual Report on the Geological Survey of Pennsylvania (Classic Reprint)