@article{78689,
      url = {http://library.usi.edu/record/78689},
      title = {Planetary exploration through year 2000 : a core program,  part one of a report /},
      publisher = {NASA,},
      recid = {78689},
      pages = {167 p. :},
      address = {Washington, D.C. :},
      year = {1983},
}