Checkland, S. G. (1948). The Birmingham Economists, 1815-1850. The Economic History Review. Blackwell Publishing on behalf of the Economic History Society. 1 (1): 1—19. doi:10.2307/2590000. JSTOR2590000.
Checkland, S. G. (1948). The Birmingham Economists, 1815-1850. The Economic History Review. Blackwell Publishing on behalf of the Economic History Society. 1 (1): 1—19. doi:10.2307/2590000. JSTOR2590000.