@techreport{oai:tsukuba.repo.nii.ac.jp:00022646,
 author = {Yamada, Tadashi and Yamada, Tetsuji and 山田, 直志},
 month = {},
 note = {Differentials in the Demand for Health Cheek-up in Japan},
 title = {Differentials in the demand for health cheek-up in Japan},
 year = {2000}
}