[Islam]. Houtsma, M.T. a.o. (ed.). E.J. Brill's First Encyclopaedia of Islam 1913-1936.

Leyden etc., E.J. Brill, 1987, 9 vols. (incl. supplement vol.), fold. plans, plates (of which 4 loosely inserted in rearpocket vol. 9), orig. unif. boards, 4to.

AND 2 others in 5 vols.: J.L. ESPOSITO (ed.), The Oxford Encyclopedia of the Modern Islamic World (Oxf., 1995, 4 vols., orig. unif. wr., 4to) and G. BOWERING (ed.), The Princeton Encyclopedia of Islamic Political Thought (Princeton/ Oxf., 2013, orig. cl. w. dustwr., 4to).