@booklet {7290,
	title = {The Social System: A Treatise on the Principle of Exchange},
	year = {1831},
	note = {<p>Rpt. New York: Augustus M. Kelley, 1973.</p>},
	month = {1831},
	publisher = {William Tait},
	address = {Edinburgh, Scot.},
	abstract = {<p>Includes part of a chapter (30-39) detailing a new economic system.</p>},
	keywords = {Male author},
	author = {John Gray (1799-1833)}
}
