@article{15966,
      recid = {15966},
      author = {Shelton, William Roy.},
      title = {Man's conquest of space,},
      publisher = {National Geographic Society},
      address = {Washington,},
      pages = {199 p.},
      year = {1968},
      note = {"Prepared by National Geographic Special Publications  Division."},
      url = {http://library.usi.edu/record/15966},
}