TY  - BOOK
AU  -  Rosset,Edward  .
AU  - Dobosz,I  .
TI  - Aging process of population / 
U1  - 305.26 
PY  - 1964///
CY  - Paris : 
PB  - Pergamon , 
KW  - SOCIAL GROUPS
N1  - Includes index and selected bibliography
ER  -