TY  - BOOK
AU  - Janney,G.D.
AU  - Tunnacliffe,Alan H.
TI  - Worked problems in opthalmic lenses
SN  - 0900099178
PY  - 1983///
CY  - London
PB  - Association of Dispensing Opticians
KW  - Ophthalmic lenses
KW  - Optics
KW  - Problems, exercises, etc
ER  -