@book{57290,
	author = {Fourquin, Guy },
	title = {Histoire Économique De L'occident Médiéval / },
	publisher = {Librairie Armand Colin, },
	year = {1969.},
	address = {Paris : },
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B13-09560.pdf}
}