Columbia subject headings:
Radioactive contamination of food--Japan--History--Sources.
Radioactive pollution--Japan--History--Sources.
School children--Food--Japan--Safety measures--History--Sources.
Harvard subject headings:
Radioactive contamination of food.
Radioactive pollution--Japan.
School children--Food--Japan--Safety measures.
Princeton subject headings:
Radioactive contamination of food--Japan--History--Sources.
Radioactive pollution--Japan--History--Sources.
School children--Food--Japan--Safety measures--History--Sources.