Hollenbach, D.D.HollenbachSHIH-I CHUMccray, R.R.Mccray2019-12-262019-12-2619760004-637Xhttps://scholars.lib.ntu.edu.tw/handle/123456789/441750H2 in Expanding Circumstellar Shellsjournal article10.1086/154627WOS:A1976CD78000024