0123962 - ASU-R 970062 RIV CZ eng B - Monography
Letfus, Vojtěch
Daily relative sunspot numbers 1818-1848: reconstruction of missing observations.
Ondřejov: Astronomical Institute of the Czech Republic, 1996. 56 s. 85.
Permanent Link: http://hdl.handle.net/11104/0022226