Vitamin A Supplements   A Guide to their Use in the Treatment and Prevention of Vitamin A Deficiency and Xerophathalmia 
WHO 
 - Second Édition 
 - Switzerland  :WHO  ,1997 
 - 28tr.  ;24cm 
<br/><br/><label>Subjects--Index Terms: </label>Nhãn khoa 
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Sách tham khảo
<br/><br/><label>Dewey Class. No.: </label>617.7