Columbia subject headings:
Kapit︠s︡a, P. L. (Petr Leonidovich), 1894-1984--Correspondence.
Physicists--Correspondence.
Harvard subject headings:
Kapit͡sa, P. L. (Petr Leonidovich), 1894-1984--Correspondence.
Physicists--Soviet Union--Correspondence.
Physics.
Science
Princeton subject headings:
Kapit︠s︡a, P. L. (Petr Leonidovich), 1894-1984--Correspondence.
Physicists--Correspondence.