TY - JOUR A1 - Dalin, P. A1 - Pertsev, N. A1 - Romejko, V. T1 - Notes on historical aspects on the earliest known observations of noctilucent clouds JO - Hist. Geo Space. Sci. J1 - HGSS VL - 3 IS - 1 SP - 87 EP - 97 Y1 - 2012/03/27 PB - Copernicus Publications SN - 2190-5029 UR - https://hgss.copernicus.org/articles/3/87/2012/ L1 - https://hgss.copernicus.org/articles/3/87/2012/hgss-3-87-2012.pdf DO - 10.5194/hgss-3-87-2012 ER -