@article{59523,
      recid = {59523},
      author = {Watkins, Joel S., and Godson, Richard H. and Watson,  Kenneth,},
      title = {Seismic detection of near-surface cavities,},
      publisher = {U.S. Govt. Print. Off.,},
      address = {Washington,},
      pages = {v, 12 p. :},
      year = {1967},
      note = {"Prepared on behalf of the National Aeronautics and Space  Administration."},
      url = {http://library.usi.edu/record/59523},
}