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Geological map of Pennsylvania (Sheet 4)
- [S.l.] : [s.n.], 1893.
Pennsylvania Geological Survey. (2nd survey) Final Report 1891-95. Companion text: Pennsylvania Geological Survey (2d:1874-1890). Final report ordered by Legislature, 1891. A summary description of the geology of Pennsylvania / J. P. Lesley. Harrisburg : Pennsylvania Geological Survey. 1892-95. Final report 1891-1895. 3 vol. in 4 and atlas : 2588p. 25pl. Atlas with 14 sh., 2 copies. Copy 2 lacks sh.9-12. Another copy of map with source publication (in atlas).
- Coal, Geology, and Pennsylvania—Maps
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