@Book{Osterwald[1768],
author  = "Osterwald, Peter von",
title   = "Entwurf einer neuen Kalenderforme",
year    = "[1768]",
address = "[München]",
series  = "Abhandlungen",
volume  = "5,[8]",
url     = "https://publikationen.badw.de/de/003395678",
}