@article{oai:ipss.repo.nii.ac.jp:00000298,
 issue = {4},
 journal = {人口問題研究, Journal of Population Problems},
 month = {Dec},
 note = {全文},
 pages = {288--387},
 title = {人口問題研究　第77巻第4号},
 volume = {77},
 year = {2021}
}