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Alnabulsi, Hani and Drury, John (2014) Social identification moderates the effect of crowd density on safety at the Hajj. Proceedings of the National Academy of Sciences, 111 (25). pp. 9091-9096. ISSN 0027-8424
Al Nabulsi, Hani (2015) The crowd psychology of the Hajj. Doctoral thesis (PhD), University of Sussex.