Vitamin A supplements : a guide to their use in the treatment and prevention of vitamin A deficiency and xerophthalmia /
WHO/UNICEF/IVACG Task Force.
International Vitamin A Consultative Group.
UNICEF.
World Health Organization.
Geneva : World Health Organization,
1997.
Includes bibliographical references.
Vitamin A deficiency.
Vitamin A.
Xerophthalmia.