Columbia subject headings:
Infrared spectroscopy--Congresses.
Optical spectroscopy--Congresses.
Solf, Josef, 1934-
Harvard subject headings:
Astronomical spectroscopy--Congresses
Circumstellar matter--Spectra--Congresses.
Infrared spectroscopy--Congresses.
Princeton subject headings:
Astronomical spectroscopy--Congresses.
Circumstellar matter--Spectra--Congresses.
Infrared spectroscopy--Congresses.
Optical spectroscopy--Congresses.