@Book{Drygalski1911,
author  = "Drygalski, Erich von",
title   = "Spitzbergens Landformen und ihre Vereisung",
year    = "1911",
address = "München",
series  = "Abhandlungen",
volume  = "Bd. 25, Abhandlung 7",
url     = "https://publikationen.badw.de/en/003071237",
}