@book{129646,
	author = {Zaydān, Jirjī, and Margoliouth, D. S.},
	title = {Umayyads and ʻAbbásids, being the fourth part of Jurjí Zaydán's History of Islamic civilization;},
	publisher = {E. J. Brill, imprimerie orientale; [etc., etc.],},
	year = {1981.},
	address = {Leyden:}
}