Columbia subject headings:
Cirrus clouds--Congresses.
Infrared sources--Congresses.
Interstellar matter--Congresses.
Harvard subject headings:
Cirrus clouds--Congresses.
Infrared cirrus (Astronomy)--Congresses.
Infrared sources--Congresses.
Interstellar clouds--Congresses.
Interstellar matter--Congresses.
Princeton subject headings:
Cirrus clouds--Congresses.
Infrared sources--Congresses.
Interstellar matter--Congresses.