Columbia subject headings:
Espionage, Soviet--Great Britain.
Espionage, Soviet--United States.
Fuchs, Klaus Emil Julius, 1911-1988.
Physicists--Great Britain--Biography.
Spies--Great Britain--Biography.
Harvard subject headings:
Espionage, Russian--Great Britain.
Espionage--Great Britain--History--20th century.
Espionage--United States--History--20th century.
Fuchs, Klaus Emil Julius, 1911-1988
Nuclear weapons--Great Britain
Nuclear weapons--United States
Spies--Great Britain--Biography.
Spies--Soviet Union--Biography.
Spies--United States--Biography.
Princeton subject headings:
Espionage--Great Britain--History--20th century.
Espionage--United States--History--20th century.
Fuchs, Klaus Emil Julius, 1911-1988.
Nuclear weapons--Great Britain.
Nuclear weapons--United States.
Spies--Great Britain--Biography.
Spies--Soviet Union--Biography.
Spies--United States--Biography.