TY - JOUR AU - W. Rammacher AU - M. Cuntz BT - Astronomy and Astrophysics N1 - JILA Pub. 4355 PY - 1990 SP - 212 EP - 219 T2 - Astronomy and Astrophysics TI - Effects of Mg II and Ca II ionization on ab-initio solar chromosphere models UR - http://articles.adsabs.harvard.edu/full/1991A\%26A...250..212R VL - 250 ER -