topic

• Geology4
• Coal3

name

• Hart, Lane S7
• Lesley, J. P. (J. Peter), 1819-19037
• White, I. C. (Israel Charles), 1848-19274
• Julius Bien & Co2
• More Less

collection

• Maps of North America7

place

• Pennsylvania7
• Allegheny County2
• Allegheny County (Pa.)2
• Beaver County1
• Beaver County (Pa.)1
• More Less

genre

• Maps7
• Geological maps4

publisher

division

• Map Division7

type

• cartographic7