Yeow, P. T. <br/><br/>
The effects of short term and long term VDU usage on visual functions and visual fatigue / 
P.T. Yeow 
 - Cardiff, UK :  Department of Optometry, University of Wales,  1988 
 - 259 p. ;  30 cm. 
<br/><br/>Thesis (Degree of Doctor of Philosophy),- University of Wales, 1988 
<br/><br/>References : p.208-250 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fatigue<br/>Vision
<br/><br/><label>National Library of Medicine Call No.: </label>WW100  / .Y46e 1988