Smith, Robert Worthington (1969). "Political Organization and Canvassing: Yorkshire Elections Before the Reform Bill". The American Historical Review. 74 (5): 1538–1560. doi:10.2307/1841324. JSTOR1841324.
Smith, Robert Worthington (1969). "Political Organization and Canvassing: Yorkshire Elections Before the Reform Bill". The American Historical Review. 74 (5): 1538–1560. doi:10.2307/1841324. JSTOR1841324.