Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Emi Koichi,Life-Scientific Approach to Population Problems,The Journal of Population Studies,03868311,Population Association of Japan,1998,22,0,1-7,https://cir.nii.ac.jp/crid/1390282679621921024,https://doi.org/10.24454/jps.22.0_1