Principles of Political Economy was created in 1848.

"Principles of Political Economy" by John Stuart Mill typically has around 500-600 pages, depending on the edition and publisher.

David Ricardo

"Essays on Some Unsettled Questions of Political Economy" was created in 1844 by economist John Stuart Mill. It was a collection of essays discussing various economic concepts and principles.

B. N. Ghosh has written:

'Gandhian Political Economy'

'Principles of Economic Science'

'Political Economy of Development and Underdevelopment'

'Disguised unemployment in underdeveloped countries, with special reference to India' -- subject(s): Disguised unemployment, Agricultural laborers