Columbia subject headings:
Astrophysics--Congresses.
Dirac, P. A. M. (Paul Adrien Maurice), 1902-1984.
Particles (Nuclear physics)--Congresses.
Harvard subject headings:
Astrophysics--Congresses
Dirac, P. A. M. (Paul Adrien Maurice), 1902-1984.
Particles (Nuclear physics)--Congresses
Princeton subject headings:
Astrophysics--Congresses.
Dirac, P. A. M. (Paul Adrien Maurice), 1902-1984.
Particles (Nuclear physics)--Congresses.