@Book{Brandenburg1906,
author  = "Brandenburg, Erich",
title   = "Neue Untersuchungen im Gebiet der Phrygischen Felsenfassaden",
year    = "1906",
address = "München",
series  = "Abhandlungen",
volume  = "23,8",
url     = "https://publikationen.badw.de/de/003214519",
}