00641cam a2200217 4500 91752766 TxAuBib 20061207120000.0 091206s2009||||||||||||||||||||||||eng|u 30610 Project Gutenberg PGUSA eng TxAuBib Blackmar, Frank W., (Frank Wilson.) History of Human Society [Gutenberg] / by Frank W., 1854-1931 Blackmar. Project Gutenberg, 2009. Freely available. Electronic text. Civilization. Progress. Sociology. http://www.gutenberg.org/license Rights TXTLL