Real refractive indices of nitric-acid/ice films: implications for optical measurements of PSCs

Middlebrook, A.M., B.S. Berland, S.M. George, M. Tolbert, and O.B. Toon (1994), Real refractive indices of nitric-acid/ice films: implications for optical measurements of PSCs, J. Geophys. Res., 99, 25,655-25.