Columbia subject headings:
Azo dyes--Congresses.
Proteins--Biotechnology--Congresses.
Proteins--Purification--Congresses.
Triazines--Congresses.
Harvard subject headings:
Princeton subject headings:
Azo dyes--Congresses.
Proteins--Biotechnology--Congresses.
Proteins--Purification--Congresses.
Triazines--Congresses.