HDAP - Heidelberg digitized astronomical plates - [Dataset]: scans of plates obtained at Landessternwarte Heidelberg-Königstuhl, its predecessors, as well as the German-Spanish Astronomical Center (Calar Alto Observatory), Spain, 1880 through 1999 - Mandel, Holger; Birkle, Kurt; Demleitner, Markus (Landessternwarte, 2014)
Seit 10.11.2007