TY - JOUR A1 - Schmidtke, G. T1 - Extreme ultraviolet spectral irradiance measurements since 1946 JO - Hist. Geo Space. Sci. J1 - HGSS VL - 6 IS - 1 SP - 3 EP - 22 Y1 - 2015/03/18 PB - Copernicus Publications SN - 2190-5029 UR - https://hgss.copernicus.org/articles/6/3/2015/ L1 - https://hgss.copernicus.org/articles/6/3/2015/hgss-6-3-2015.pdf DO - 10.5194/hgss-6-3-2015 ER -