TY  - BOOK
AU  - Fries, James F. 
AU  - Crapo, Lawrence M. 
TI  - Vitality and againg: : implications of the rectangular curve
SN  - 071671308X
AV  - QP 86 F 73 1981 
PY  - 1981///
CY  - San Francisco
PB  - : W.H. Freeman
KW  - Vejez
KW  - Longevidad
KW  - Vitalidad
N1  - Includes index
ER  -