TY  - JOUR
PY  - 1993//
TI  - The "Age 60" rule approaching the twenty-first century
JO  - Aviation, space, and environmental medicine
A1  - Clarke, W. R.
SP  - 1059
EP  - 1059
VL  - 64
IS  - 11
N2  - <p>[Abstract unavailable]</p> <p>Language: en</p> 
LA  - en
SN  - 0095-6562
UR  - http://dx.doi.org/
ID  - ref1
ER  -