Strategies for the prevention of blindness in national programmes: A primare health care approach / 
WHO. 
 - 2a ed. 
 - Ginebra :  WHO,  1997 
 - 104 p. ;  24 cm. 
<br/><br/> Revisado moncho 
<br/><br/><label>ISBN: </label>9241544929 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ojos --Enfermedades --Prevención
<br/><br/><label>LC Class. No.: </label>RE46  / O74 1997