http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
An essay concerning the true original, extent and end of civil government, by John Locke.--Of the original contract, by David Hume.--The social contract, by J.J. Rousseau; translator by Gerard Hopkins.
London, New York, Oxford University Press [1952]