@article{121516,
      note = {"Magnetic, electromagnetic, gravimetric, seismic  refraction, and precise topographic surveys gave only  subtle hints of underground openings, suggesting the need  for further research in geophysical techniques."},
      author = {Miller, C. H.},
      url = {http://library.usi.edu/record/121516},
      title = {Geophysical studies to detect the Acme Underground Coal  Mine, Wyoming /},
      publisher = {U.S. Geological Survey,},
      recid = {121516},
      pages = {27 p.:},
      address = {Denver, Colo. :},
      year = {1987},
}