@book{130179,
	author = {Kaptein, N. J. G.},
	title = {Muḥammad's Birthday festival :},
	publisher = {E.J. Brill,},
	year = {1993.},
	address = {Leiden :},
	note = {A revision in English of the author's Dutch thesis (doctoral)--Leiden University, 1989.}
}