Columbia subject headings:
A stars--Congresses.
B stars--Congresses.
Cousins, A. W. J.
Pulsating stars--Congresses.
Harvard subject headings:
A stars--Congresses.
B stars--Congresses.
Cousins, A. W. J.
Pulsating stars--Congresses.
Princeton subject headings:
A stars--Congresses.
B stars--Congresses.
Cousins, A. W. J.
Pulsating stars--Congresses.