The Provision of spectacles at low cost. 

 - 32p. 
<br/><br/><label>ISBN: </label>92-4-156108-4 
<br/><br/><label>Subjects--Corporate Names: </label><br/>World Health Organization
<br/><br/><label>Subjects--Topical Terms: </label><br/>Eye glasses<br/>Vision disorders--Prevention and control