Griffin, C. P. (1969). The economic and social development of the Leicestershire and South Derbyshire coalfied 1550-1914.
Chicago-referens (17:e uppl.)Griffin, C. P. The Economic and Social Development of the Leicestershire and South Derbyshire Coalfied 1550-1914. 1969.
MLA-referens (8:e uppl.)Griffin, C. P. The Economic and Social Development of the Leicestershire and South Derbyshire Coalfied 1550-1914. 1969.
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