@article{9792,
      note = {"Symposia sponsored by International Academy of  Astronautics and held at Mar del Plata, Argentina, October  10, 1969; Constance, German Federal Republic, October  11-12, 1970; Brussels, Belgium, September 23, 1971; Vienna,  Austria, October 13, 1972. "},
      author = {Hall, R. Cargill.},
      url = {http://library.usi.edu/record/9792},
      title = {Essays on the history of rocketry and astronautics :  proceedings of the third through the sixth history symposia  of the International Academy of Astronautics /},
      publisher = {NASA ;},
      recid = {9792},
      pages = {2 v. :},
      address = {Washington :},
      year = {1977},
}