खोज परिणाम - "Coal mines and mining Pennsylvania."
प्रस्तावित विषय : खोज निहित
प्रस्तावित विषय : खोज निहित
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1
Annual report on mining activities /
प्रकाशित 1986विषय: “…Coal mines and mining Pennsylvania Statistics Periodicals.…”
पुस्तक
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2
Selected geologic factors affecting mining of the Pittsburgh coalbed /
प्रकाशित 1975विषय: “…Coal mines and mining Pennsylvania.…”
अज्ञात -
3
Subsidence over four room-and-pillar sections in southwestern Pennsylvania /
प्रकाशित 1982विषय:पुस्तक -
4
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5
Flames and embers of coal : a historical novel of the Anthracite region /
प्रकाशित 1990विषय:पुस्तक