Sommer, A <br/><br/>
Field guide to the detection and control of xerophthalmia 

 - 2nd ed. 
 - Geneva  WHO  1982 
 - 58 P.   
<br/><br/><label>ISBN: </label>9241541628 
<br/><br/><label>Dewey Class. No.: </label>616.396  / S55