Columbia subject headings:
Astronomical spectroscopy.
Interstellar matter--Chemical properties.
Interstellar matter--Spectra.
Interstellar molecules.
Molecular spectroscopy.
Harvard subject headings:
Interstellar molecules--Congresses.
Princeton subject headings:
Infrared spectroscopy--Congresses.
Interstellar molecules--Congresses.
Surface chemistry--Congresses.