Columbia subject headings:
Galactic center--Congresses.
Infrared astronomy--Congresses.
Radio astronomy--Congresses.
Harvard subject headings:
Galactic center--Congresses.
Infrared astronomy--Congresses.
Physics.
Radio astronomy--Congresses
Princeton subject headings:
Galactic center--Congresses.
Infrared astronomy--Congresses.
Radio astronomy--Congresses.