@Book{MerzbacherGroeber1916,
author  = "Merzbacher, Gottfried and Groeber, Paul [Sonst.]",
title   = "Die Gebirgsgruppe Bogdo-Ola im östlichen Tian-Schan",
year    = "1916",
address = "München",
series  = "Abhandlungen",
volume  = "27,5",
url     = "https://publikationen.badw.de/en/003071255",
}