@book{oai:rakuno.repo.nii.ac.jp:00001821,
 author = {山下, 亜紀郎},
 month = {Jul},
 note = {Book chapter},
 publisher = {古今書院},
 title = {GISの概念と歴史　(1 概念編 -3)},
 year = {2009}
}