TY  - BOOK
AU  - Mechnikov,Il'ia Illich
TI  - Ensayos optimistas
PY  - 1945///
CY  - Buenos Aires
PB  - Editorial Americalee
KW  - Longevity
KW  - Local
KW  - Hygiene
KW  - Old age
N1  - Translation of : Etiudy optimizma; Includes bibliographical references
ER  -