B

Blades, J.C. and Sahu, M.S. and He, L. and Crawford, Ian and Barlow, M.J. and Diego, F. (1997) Ultra-high-resolution observations of interstellar Na I and Ca II toward the high-galactic latitude star HD 28497. The Astrophysical Journal 478 (2), pp. 648-657. ISSN 0004-637X.