@article{oai:ipss.repo.nii.ac.jp:00000308,
 issue = {3},
 journal = {人口問題研究, Journal of Population Problems},
 month = {Sep},
 note = {全文},
 pages = {239--290},
 title = {人口問題研究　第77巻第3号},
 volume = {77},
 year = {2021}
}