Lihat Juga

• Studies on the stratification of the anthracite measures of Pennsylvania
  oleh: Wasmuth, Henry A.
  Terbitan: (1887)
• The oil sands of Pennsylvania
  oleh: Ashburner, Chas A.
  Terbitan: (1878)
• Silver From a Pennsylvania Mound
  oleh: Thomas, C.
  Terbitan: (1885)
• The use of anthracite coal as a fuel
  oleh: Sheafer, P. W.
  Terbitan: (1867)
• The southern anthracite coal field or pennsylvania—its enormous disturbances and consequent premature exhaustion
  oleh: Wasmuth, Henry A.
  Terbitan: (1888)