00587cam a2200181 4500 148969514 TxAuBib 20091208120000.0 130503s2013||||||||||||||||||||||||eng|u 42638 Project Gutenberg PGUSA eng TxAuBib Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 6 [Gutenberg] : Map" to "Mars / Various. Project Gutenberg, 2013. Freely available. Electronic text. http://www.gutenberg.org/ebooks/42638 http://www.gutenberg.org/license Rights TXTLL