1. It develops some themes outlined in two earlier papers: Notes on Geography and Historical Materialism, Social Geography and the City Seminar Series, SSRC, March 1979 and Historical Materialism and Explanation in Urban Geography delivered at the Joint Meeting of Urban and Social IBG Study Groups, London, September, 1979.
2. Tactics and Ethics: Political Essays 1919–1929;Lukacs,1975
3. Grundrisse;Marx;The Method of Political Economy,1857