Columbia subject headings:
Erythrocytes--Congresses.
Hemoglobin--Congresses.
Oxyhemoglobin--Congresses.
Harvard subject headings:
Erythrocytes--Congresses.
Hemoglobin--Congresses.
Oxyhemoglobin--Congresses.
Princeton subject headings:
Erythrocytes--Congresses.
Hemoglobin--Congresses.
Oxyhemoglobin--Congresses.