@article{oai:niigata-u.repo.nii.ac.jp:00025255,
 author = {鳥元, 秀幸},
 journal = {新潟応用地質研究会誌, 新潟応用地質研究会誌},
 month = {Jun},
 pages = {29--45},
 title = {GPSのおはなし},
 volume = {48},
 year = {1997}
}