Columbia subject headings:
Harvard subject headings:
Blood--Pigments--Structure-activity relationships--Congresses.
Hemocyanin--Structure-activity relationships--Congresses.
Hemoglobin--Structure-activity relationships--Congresses.
Princeton subject headings:
Blood--Pigments--Structure-activity relationships--Congresses.
Hemocyanin--Structure-activity relationships--Congresses.
Hemoglobin--Structure-activity relationships--Congresses.