Malthus, T. R. 1. (1827). Definitions in political economy: Preceded by an inquiry into the rules which ought to guide political economists in the definition and use of their terms, with remarks on the deviation from these rules in their writings. London: J. Murray.

Malthus, T. R. 1766-1834. Definitions in Political Economy: Preceded By an Inquiry Into the Rules Which Ought to Guide Political Economists in the Definition and Use of Their Terms, With Remarks On the Deviation From These Rules in Their Writings. London: J. Murray, 1827.

Malthus, T. R. 1766-1834. Definitions in Political Economy: Preceded By an Inquiry Into the Rules Which Ought to Guide Political Economists in the Definition and Use of Their Terms, With Remarks On the Deviation From These Rules in Their Writings. London: J. Murray, 1827.