@book{13668,
	author = {Kupffer, Karl Wilhelm, and Benecke, Berthold Adolf,},
	title = {Photogramme zur ontogenie der vögel.},
	publisher = {Für die Akademie in commission by U. Engelmann in Leipzig,},
	year = {1879.},
	address = {Halle,},
	note = {At head of title: Nova acta der Ksl. Leop.-Carol.-deutschen akademie der naturforscher, band XLI.  pars I, nr. 3.}
}