The Provision of spectacles at low cost 
World Health Organization 
 - Geneva  World Health Organization  1987 
 - 32 p. 
<br/><br/><label>ISBN: </label>92-4-156108-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Eye glasses
<br/><br/><label>Dewey Class. No.: </label>617.752  / WOR