Vitamin A supplement: a guide to their use in the treatment and prevention of vitamin A deficiency and xerophthalmia 
World Health Organization 
 - 2nd ed. 
 - Geneva  World Health Organization  1997 
 - vi, 28 p. 
<br/><br/><label>ISBN: </label>92-4-154506-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ophthlmology
<br/><br/><label>Dewey Class. No.: </label>617.7  / WOR