Three Pyramids of Giza in Egypt were completed over 4,500 BC, around 2500 BC. Although there are many mystery parts in the method of constructing the pyramid, Mr. Vaclav Smir, emeritus professor of ...
Color illustrations, including front cover. Hidden ramps may solve the mystery of the Great Pyramid's construction. https://siris-libraries.si.edu/ipac20/ipac.jsp ...
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