1872|Gray, Ormando Willis; Walling, H. F.1:300 000
Coal, Iron, and Oil; or, the Practical American miner. A plain and popular work on our mines and mineral resources ... With numerous maps and engravings, etc
1866|DADDOW, Samuel Harries and BANNAN (Benjamin)
Plate H. South Central Pennsylvania.
1871|Hopkins, G.M.
Clearfield, Cambria, Blair counties.
1872|Gray, Ormando Willis; Walling, H. F.1:300 000
Fannett, Franklin County, Pennsylvania. Doylesburg.
1868|Beers, D.G.1:50 688
Profiles of Massachusetts Railroad, Florida Canal...
1834|Tanner, Henry S.
Somerset, Bedford, Fulton counties.
1872|Gray, Ormando Willis; Walling, H. F.1:300 000
