Penn. iron, coal, petroleum, zinc.
Map of Pennsylvania showing the principal deposits of iron, anthracite coal, petroleum and zinc. Engraved by W.S. Barnard, N.Y. (Published by Stedman, Brown & Lyon, Philadelphia, 1872)
David RumseyWalling, H. F.
1872
1872
Stedman, Brown & Lyon
1:1 200 000