SEARCH Articles Figures Tables IRAS/IRRAS spectroscopy IRRAS IRRAS infrared spectroscopy) Infrared reflection absorption spectroscopy PM-IRRAS) Infrared reflection adsorption spectroscopy IRRAS) Infrared reflection-absorption spectroscopy IRRAS Polarization-Modulation Infrared Reflection-Absorption Spectroscopy (PM-IRRAS) Reflection-Absorption Spectroscopy (IRRAS) Vibrational Spectroscopy (IRRAS)