TY  - JOUR
PY  - 1970//
TI  - Sans serif letters for Snellen charts
JO  - JAMA journal of the American Medical Association
A1  - Deederer, C.
SP  - 1699
EP  - 1699
VL  - 211
IS  - 10
N2  - <p>[Abstract unavailable]</p> <p>Language: en</p> 
LA  - en
SN  - 0098-7484
UR  - http://dx.doi.org/
ID  - ref1
ER  -