Subsidence over four room-and-pillar sections in southwestern Pennsylvania /

Salvato in:
Dettagli Bibliografici
Autore principale: Moebs, Noel N.
Natura: Libro
Lingua:inglese
Pubblicazione: Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1982.
Serie:Report of investigations 8645
Soggetti:
Mine subsidence > Pennsylvania > Measurement.
Coal mines and mining > Pennsylvania > Safety measures.
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