1. C. Gifford’s letter to Joan Robinson. (1932, November 26). JVR Collection, King’s Modem Archives.
2. G.F. Shove’s letter to Joan Robinson. (1932, October 19). JVR Collection, King’s Modem Archives.
3. Ayres, C. E. (1944). The Theory of Economic Progress. University of North Carolina Press.
4. Baran, P. (1957). The Political Economy of Growth. Monthly Review Press.
5. Bardhan, P. (1986). Marxist Ideas in Development Economics: An Evaluation. In J. Roemer (Ed.), Analytical Marxism. Cambridge University Press.