TY - JOUR AU - W. Hagen AU - R. Stencel AU - D. Dickinson BT - The Astrophysical Journal DA - Jan-11-1983 DO - 10.1086/161446 PY - 1983 EP - 286 T2 - The Astrophysical Journal TI - The circumstellar envelopes and chromospheres of cool giants and supergiants UR - http://articles.adsabs.harvard.edu/full/1983ApJ...274..286H VL - 274 SN - 0004-637X ER -