@misc{oai:tsukuba.repo.nii.ac.jp:00011493,
 author = {Sakurai, Akihisa and 桜井, 明久},
 month = {},
 note = {1983, 【要旨】},
 title = {A geographical study on the changes of agricultural land use in the Limburg region, West Germany},
 year = {1984}
}