I downloaded the whole paper and in amongst the data was this:

Sphinx description
The Sphinx lies in a WE axis and looks towards the E. It is 19.8m high (including 5m for the head), 14m wide and 73.2m long. As most of the facing of small stones has disappeared it is cleary visible that the monument has been carved in the rock. The Sphinx’s body (Fig. 5) is cut into a series of marl limestone layers in which layers of limestone 40cm to 2m thick arealternated with 10 to 60cm marl layers. The neck is a 3m thick marl bed. The 5m high head iscarved in a succession of 5 beds of competent brown dolomite limestone, 30cm to 1.6mthick. This series dips evenly towards the SE (around 10°). That these levels are visibly instratigraphic continuity with the geological series of the plateau. It is apparent that the Sphinx was carved out of the local marl-limestone series on its south and est sides

However there seems to be, as usual a bit of a problem with the dimensions.

Another sight uses these measurements.

20 m x 19 m x 73 m

The Great Sphinx of Giza is a giant 4,500-year-old limestone statue situated near the Great Pyramid in Giza, Egypt. Measuring 240 feet (73 meters) long and 66 feet (20 meters) high, the Great Sphinx is one of the world's largest monuments. Jan 4, 2018 [www.google.com]

So since this sight can't even measure The Sphinx properly how much faith do we place on the other data ?

Cheers

"There is nothing as impenetrable as a closed mind"
and ..." if everything is a coincidence what is the point of studying or measuring or analyzing anything ?" db