Sommer, Alfred <br/><br/>
Vitamin A deficiency and its consequences :  a field guide to detection and control / 
Alfred Sommer 
 - 3rd ed. 
 - Geneva :  World Health Organization,  1995 
 - 69 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>9241544783 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vitamin A dificiency<br/>Prevention and control