@article{199690,
      note = {Cover title.},
      author = {Crovelli, Robert A. and Balay, Richard H.},
      url = {http://library.usi.edu/record/199690},
      title = {APRAS analytic petroleum resource appraisal system :  microcomputer programs for play analysis using a field-size  model / [microform] :},
      publisher = {U.S. Geological Survey :},
      recid = {199690},
      pages = {ii, 30 leaves :},
      address = {[Denver, Colo.] :},
      year = {1992},
}