@Book{Spiegelberg1928,
author  = "Spiegelberg, Wilhelm",
title   = "Demotica. (20 - 34)",
year    = "1928",
address = "München",
series  = "Sitzungsberichte",
volume  = "1928,2",
url     = "https://publikationen.badw.de/en/009325408",
}