topic

• Coalfields1
• Coke1
• Geology1
• Mines and mineral resources1
• More Less

name

• American Association for the Advancement of Science1
• Bradford, J. N1
• Chamber of Commerce of Pittsburgh1
• Krebs, Otto1

collection

• Maps of North America2

place

• Ohio1
• Pennsylvania1
• Pittsburgh (Pa.)1
• Pittsburgh Region1

genre

• Maps2
• Geological maps1
• Thematic maps1

publisher

• American Association for the Advancement of Science1
• Chamber of Commerce of Pittsburgh1

division

type

• cartographic2