@Book{Lutz1928,
author  = "Lutz, Karl W.",
title   = "Das normale luftelektrische Potentialgefälle in München 1906 -1925",
year    = "1928",
address = "München",
series  = "Sitzungsberichte",
volume  = "1928,2",
url     = "https://publikationen.badw.de/de/003383221",
}