TY - JOUR A1 - Carlson, P. A1 - Watson, A. A. T1 - Erich Regener and the ionisation maximum of the atmosphere JO - Hist. Geo Space. Sci. J1 - HGSS VL - 5 IS - 2 SP - 175 EP - 182 Y1 - 2014/12/18 PB - Copernicus Publications SN - 2190-5029 UR - https://hgss.copernicus.org/articles/5/175/2014/ L1 - https://hgss.copernicus.org/articles/5/175/2014/hgss-5-175-2014.pdf DO - 10.5194/hgss-5-175-2014 ER -