@book{11,
	author = {Schumann, Willy},
	title = {Grundlehre für Metallwerker},
	publisher = {Diesterweg},
	year = {1943},
	series = {Fachkunde},
	address = {Frankfurt a. M.},
	note = {[Nebst] Zahlentaf.},
	url = {https://d-nb.info/578646145/04}
}