D. A .King, 1997, Two Iranian World Maps for Finding the Direction and Distance to Mecca, Imago Mundi, 49:62-82 + plate facing page 88.

M. Houstsma, ed., 1927, Encyclopaedia of Islam, Leiden, Brill. Articles in volume II on “Hadjdj” (196-201, by Wensinck), “Ka’ba” (584-592, by Wensinck), “Kibla” (985-989, by Schoy).

W. Tobler, 2002, “Qibla, and related, Map Projections”, Cartography & Geographical Information Science, 29 (1):17-23.

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