TY  - BOOK
AU  - Duke-Elder
TI  - Duke-Elder's practice of refraction 
SN  - 9788131233337
U1  - 617.755 
PY  - 1983/// (reprint 2020)
CY  - India
PB  - RELX India
KW  - Duke-Elder
KW  - Eye
KW  - Accommodation and refraction
ER  -