Increase in mortality of middle-aged males in Japan.

Bibliográfalaš dieđut
Váldodahkki: Okubo, Masakazu, 1926-
Materiálatiipa: Girji
Giella:eaŋgalasgiella
Almmustuhtton: Tokyo Population Research Institute, Nihon University 1981.
Ráidu:NUPRI research paper series no.3
Fáttát: