00553cam a2200181 4500 100291320 TxAuBib 20070420120000.0 040917s2004||||||||||||||||||||||||eng|u 13488 Project Gutenberg PGUSA eng TxAuBib O'Brien, George. An Essay on Mediaeval Economic Teaching [Gutenberg] / by George O'Brien. Project Gutenberg, 2004. Project Gutenberg. Freely available. Electronic text. http://www.gutenberg.org/license Rights