Reginald Engelbach. The Problem of the Obelisks, From a Study of the Unfinished Obelisk at Aswan. – London: T. Fisher Unwin, 1923. P. 104.
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130
Reginald Engelbach. The Aswan Obelisk with Some Remarks on the Ancient Engineering. Le Caire: Imprimerie De L'institut Francais D'archeologie Orientale, 1922. P. 4.
