Barrow, G. (1919). The Geology of the country around Lichfield: Including the northern parts of the South Staffordshire and Warwickshire coalfields. E. Stanford, Ltd.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিBarrow, George. The Geology of the Country Around Lichfield: Including the Northern Parts of the South Staffordshire and Warwickshire Coalfields. London: E. Stanford, Ltd, 1919.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিBarrow, George. The Geology of the Country Around Lichfield: Including the Northern Parts of the South Staffordshire and Warwickshire Coalfields. E. Stanford, Ltd, 1919.
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