Columbia subject headings:
Folic acid in human nutrition--Congresses.
Folic acid--Metabolism--Congresses.
Harvard subject headings:
Folic acid in human nutrition--Congresses.
Folic acid--Metabolism--Congresses.
Nutrition--Requirements
Princeton subject headings:
Folic acid in human nutrition--Congresses.
Folic acid--Metabolism--Congresses.
Nutrition--Requirements.