@book{695,
	author = {Opderbecke, Adolf},
	title = {Der Maurer},
	publisher = {Bernh. Frdr. Voigt},
	year = {1925},
	series = {Das Handbuch des Bautechnikers},
	address = {Leipzig},
	edition = {6. verbesserte und vermehrte Auflage},
	url = {https://d-nb.info/361565860/04}
}