@article{263517,
      note = {Cover title.},
      author = {Abrams, Gerda. and Grout, Marilyn A.},
      url = {http://library.usi.edu/record/263517},
      title = {Principal facts for gravity stations in the Wolf Creek  anticline area, Piceance basin, Colorado [microform] /},
      publisher = {U.S. Geological Survey,},
      recid = {263517},
      pages = {i, 7 leaves :},
      address = {[Denver, CO] :},
      year = {1990},
}