topic

• Coal1
• Geology1
• Oil wells1
• Stratigraphic correlation1

name

• Ashburner, Charles A. (Charles Albert), 1854-18892
• Bien, Julius, 1826-19092
• Hart, Lane S2
• Lesley, J. P. (J. Peter), 1819-19031
• More Less

collection

• Maps of North America2

place

• Pennsylvania2
• Elk County1
• McKean County1
• Sergeant (Pa. : Township)1
• Sergeant (Township)1

genre

• Maps2
• Charts1
• Diagrams1
• Geological cross-sections1
• Topographic maps1

publisher

• Board of Commissioners for the Second Geological Survey2

division

• Map Division2

type