TY  - BOOK
AU  - Clark Robert L
AU  -  Spengler Joseph J
TI  - Economics of individual and population aging
T2  - Cambridge Surveys of Economic Literature
SN  - 0521297028
U1  - Y13:(X:958), M0 
PY  - 1980///
CY  - Cambridge
PB  - Cambridge University Press        
KW  - Old Persons
N1  - Bibliography P 170-207
ER  -