Bibliography:

1 - How Much Would It Cost to Build the Pyramid Today? - Natalie Wolchover. Live Science - https://www.livescience.com/18589-cost-build-great-pyramid-today.html

2 - Program Management B.C. - Craig Smith. Civil Engineering Magazine. - http://www.ekt.bme.hu/CM-BSC-MSC/ProgramManagementBC.pdf - [pg. 3]

3 - Sliding Friction on Wet and Dry Sand - Falls et al. Physical Review Letters. - https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.175502 - [fig. 5]

4 - Building the Great Pyramid: Probable Construction Methods Employed at Giza - James Frederick Edwards. Technology and Culture - https://www.jstor.org/stable/25148110?seq=1 - [pg. 341]

5 - Ancient Civilizations 3rd Edition - Christopher Scarre and Brian Fagan - ISBN 13: 9780131928787 - [pg. 126]

 6 - Histories - Herodotus - https://files.romanroadsstatic.com/materials/herodotus.pdf - [pg. 150]

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