Nickell Joe. Unsolved History: Investigating Mysteries of the Past. – The University Press of Kentucky, 2005. P. 10.
125
фон Дэникен Эрих. Каменный век был иным… Будущее, скрытое в загадках прошлого. – М.: Эксмо, 2006. – С. 112.
126
127
Jean-Pierre Protzen. Inca Quarrying and Stonecutting. Nawpa Pacha: Journal of Andean Archaeology. No. 21 (1983), pp. 183–214.
128
Reginald Engelbach. The Problem of the Obelisks, From a Study of the Unfinished Obelisk at Aswan. – London: T. Fisher Unwin, 1923. P. 104.
129
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.