Columbia subject headings:
Harvard subject headings:
Cancer--Radiotherapy--Switzerland--History--20th century.
Medical radiology--Political aspects--Switzerland--History--20th century.
Medical radiology--Switzerland--History--20th century.
Radiotherapy--Switzerland--History--20th century.
Princeton subject headings:
Cancer--Radiotherapy--Switzerland--History.
Medical radiology--Switzerland--History.
Radiotherapy--Switzerland--History.