00555cam a2200181 4500 100287628 TxAuBib 20070420120000.0 060207s2006||||||||||||||||||||||||fre|u 17538 Project Gutenberg PGUSA fre TxAuBib Greef, Guillaume de. Les lois sociologiques [Gutenberg] / by Guillaume de, 1842-1924 Greef. Project Gutenberg, 2006. Project Gutenberg. Freely available. Electronic text. http://www.gutenberg.org/license Rights