TY - GEN PB - Finnischen Literaturgesellschaft CY - Helsingfors L2 - http://bibliotekacyfrowa.pl/Content/99113 PY - 1937 KW - photographic photometry of stars KW - stars position correction KW - Helsigfors observatory UR - http://bibliotekacyfrowa.pl/dlibra/publication/edition/99113 ER -