Columbia subject headings:
Colon (Anatomy)--Diseases--Diagnosis--Atlases.
Colon (Anatomy)--Radiography--Atlases.
Diagnosis, Radioscopic--Atlases.
Rectum--Diseases--Diagnosis--Atlases.
Rectum--Radiography--Atlases.
Harvard subject headings:
Colon (Anatomy)--Diseases--Diagnosis--Atlases.
Colon (Anatomy)--Radiography--Atlases.
Diagnosis, Radioscopic--Atlases.
Rectum--Diseases--Diagnosis--Atlases.
Rectum--Radiography--Atlases.
Princeton subject headings: