This is a personal project by @dellsystem. I built this to help me retain information from the books I'm reading.
Source code on GitHub (MIT license).
explaining the differences between Proudhon's method in System of Economic Contradictions and his own (December 1846)
Marx, K. (2000). Letter to Annenkov. In Marx, K. Karl Marx: Selected Writings. Oxford University Press, pp. 209-211
