@book{id_150,
author = "Kepler, Johannes",
title = "Die Keplerbriefe auf der Braunschweigischen Landesbibliothek in Wolfenbüttel",
year = "1934",
address = "München",
series = "Abhandlungen",
volume = "23",
url = "http://publikationen.badw.de/de/005753170",
}