Columbia subject headings:
Enzymes--Analysis--Congresses.
Hormones--Analysis--Congresses.
Proteins--Analysis--Congresses.
Radioimmunoassay--Congresses.
Harvard subject headings:
Enzymes--Analysis--Congresses.
Hormones--Analysis--Congresses.
Proteins--Analysis--Congresses
Radioimmunoassay--Congresses.
Princeton subject headings: