TY - CONF T1 - Modelling helium ions in the earth's upper atmosphere JO - DYNAMICS OF ATMOSPHERES AND OCEANS PY - 2001/10/01 AU - Wilford CR AU - Moffett RJ AU - Rees JM ED - VL - 34 IS - 2-4 SP - 383 EP - 397 Y2 - 2024/12/22 ER -