Geological map of Crawford and Erie Counties.

Geological map of Crawford and Erie Counties. By L.C. White, Ass't Geologist. 1880. Julius Bien Photolith. Lane S. Hart, State Printer. Crawford and Eerie Cos. - Sheet 1, Erie County. Grand atlas, Division I, Part I. Sheet no. XV.

Geological Survey of Pennsylvania

1880

1885

Second Geological Survey of Pennsylvania

1:125 000

• Scoprire
• Confronto
• 3D
• Documento