@Book{Wolf1909,
author  = "Wolf, Max",
title   = "Photographien und Zeichnungen des Kometen 1907 d, Daniel. Mit 3 Tafeln",
year    = "1909",
address = "München",
series  = "Abhandlungen",
volume  = "Bd. 23, Abth. 3 = [7]",
url     = "https://publikationen.badw.de/en/003071206",
}