TY  - GEN
AU  - Ball,M J
TI  - General ophthalmic services--a practical alternative
SN  - 0007-1447
PY  - 1979///0221
KW  - Canada
KW  - Costs and Cost Analysis
KW  - Eyeglasses
KW  - economics
KW  - United States
N1  - Publication Type: Letter
UR  - https://doi.org/10.1136/bmj.2.6146.1232-c
ER  -