TY  - BOOK
AU  - Yeow,P.T.
TI  - The effects of short term and long term VDU usage on visual functions and visual fatigue
PY  - 1988///
CY  - Cardiff, UK
PB  - Department of Optometry, University of Wales
KW  - Fatigue
KW  - Vision
N1  - Thesis (Degree of Doctor of Philosophy),- University of Wales, 1988; References : p.208-250
ER  -