Columbia subject headings:
Bok, Bart J. (Bart Jan), 1906-1983.
Magellanic Clouds--Congresses.
Harvard subject headings:
Bok, Bart J. (Bart Jan), 1906-1983.
Magellanic Clouds--Congresses.
Princeton subject headings:
Bok, Bart J. (Bart Jan), 1906-1983.
Magellanic Clouds--Congresses.