@Book{Steinheil1866,
author  = "Steinheil, Carl August",
title   = "Photographen-Apparat zur Aufnahme von Naturstudien",
year    = "1866",
address = "München",
series  = "Sitzungsberichte",
volume  = "1866,2,23",
url     = "https://publikationen.badw.de/de/003385116",
}