J. Fletcher, ‘What is the Black Country’, The Blackcountryman 1(1) (1967), 11-13 [1]
books.google.com
"Birmingham and the Black Country are neighbouring areas located in the English West Midlands. ... The Black Country has no agreed physical or political boundaries being defined instead of what is it is not, and primarily, by its residents, in opposition to the neighbouring large city of Birmingham" (Clark 2013, p. 140). Clark, Urszula (2013), Language and Identity in Englishes, Routledge, pp. 92–94, 140, ISBN9781135904807
Murchison, Roderick (1839). The Silurian System. London: John Murray. pp. 463–479.
Bristow, C.M.; Sedman, J.; Beatty, D.; Nice S.; Lucas H.; Griffiths R.; Stanton W.; Harrison D.; Barrett B.; Roberts D. (2002). "Appendix 1: The field excursions at the conference". In Scott P.W. & Bristow C.M. (ed.). Industrial minerals and extractive industry geology: based on papers presented at the combined 36th Forum on the Geology of Industrial Minerals and 11th Extractive Industry Geology Conference, Bath, England, 7th–12th May, 2000. Special publication. London: Geological Society. p. 368. ISBN978-1-86239-099-7.
