Columbia subject headings:
Harvard subject headings:
Enriched sugar--Physiological effect.
Nutrition surveys--Guatemala.
Vitamin A deficiency--Guatemala--Prevention.
Vitamin A deficiency--Guatemala--Statistics.
Vitamin A.
Princeton subject headings:
Enriched sugar--Physiological effect.
Nutrition surveys--Guatemala.
Vitamin A deficiency--Guatemala--Prevention.
Vitamin A deficiency--Guatemala--Statistics.
Vitamin A.