Columbia subject headings:
Harvard subject headings:
Astronomical spectroscopy--Congresses
Carbon monoxide--Congresses.
Interstellar molecules--Congresses.
Millimeter astronomy--Congresses.
Molecular clouds--Congresses.
Princeton subject headings:
Astronomical spectroscopy--Congresses.
Carbon monoxide--Congresses.
Interstellar molecules--Congresses.
Millimeter astronomy--Congresses.
Molecular clouds--Congresses.