TY  - BOOK
ED  - World Health Organization.
TI  - Methods of assessment of avoidable blindness
SN  - 9241700548
PY  - 1980///
CY  - Geneva
PB  - World Health Organization
KW  - Vision tests
KW  - Blindness
KW  - prevention and control
UR  - http://apps.who.int/iris/
ER  -