The measurements of the shafts are those published by Rudolf Gantenbrink on his website.
All the other measurements are from the following books:
W. M. Flinders Petrie "The Pyramids and Temples of Gizeh"
I. E. S. Edwards "The Pyramids of Egypt"
Mark Lehner "The Complete Pyramids"
The measurements for the relieving chambers, the well shaft and the pit in the subterranean chamber are only approximations deduced from the diagrams in these books.
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