TY - BOOK AU - Sumner,William Graham,1840-1910 TI - What Social Classes Owe to Each Other AV - HN PY - 2006/// PB - Project Gutenberg KW - Economics KW - Social ethics N1 - Project Gutenberg; Freely available; Electronic text UR - http://www.gutenberg.org/etext/18603 UR - http://www.gutenberg.org/license ER -