00640cam a2200193 4500 106084914 TxAuBib 20080627120000.0 120626s2012||||||||||||||||||||||||eng|u 40091 Project Gutenberg PGUSA eng TxAuBib Ballard, Robert D. The Solution of the Pyramid Problem or, Pyramide Discoveries with a New Theory as to their Ancient Use [Gutenberg] / by Robert Ballard. Project Gutenberg, 2012. Project Gutenberg. Freely available. Electronic text. http://www.gutenberg.org/license Rights TXTLL