@book{111945,
	author = {Bersch, Josef, and Bersch, Wilhelm,},
	title = {The manufacture of earth colours},
	publisher = {Project Gutenberg,},
	year = {2023},
	address = {Salt Lake City, UT :},
	note = {Release date is 2023-07-18},
	url = {https://archive.org/details/manufactureofear00bersrich}
}