TY - BOOK ED - UNICEF ED - World Health Organization ED - International Vitamin A Consultative Group TI - Vitamin A supplements: a guide to their use in the treatment and prevention of vitamin A deficiency and xerophthalmia SN - 9241542365 PY - 1988/// CY - Geneva PB - World Health Organization KW - Vitamin A KW - Therapeutic use KW - Vitamin A deficiency KW - Drug therapy KW - Prevention & control KW - Xerophthalmia ER -