@book{88341,
	author = {Conz, Gustav,},
	title = {Lehrbuch der Perspective},
	publisher = {Project Gutenberg,},
	year = {2014},
	address = {Salt Lake City, UT :},
	note = {Release date is 2014-11-30},
	url = {https://www.gutenberg.org/ebooks/47502}
}