@book{74048,
	author = {Schoenflies, A.},
	title = {Einführung in die Hauptgesetze der Zeichnerischen Darstellungsmethoden},
	publisher = {Project Gutenberg,},
	year = {2010},
	address = {Salt Lake City, UT :},
	note = {Release date is 2010-07-19},
	url = {https://www.gutenberg.org/ebooks/33202}
}