TY  - RPRT
TI  - Visolett magnifier without and with bifocal.
AU  - G E Fonda
PY  - 1989
DO  - 10.1016/s0161-6420(89)32984-8
UR  - https://pubmed.ncbi.nlm.nih.gov/2779986/
ID  - 2779986
ER  -