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3. On the Formation of Reef Knolls;Tiddeman;Rpt. Brit. Assoc (Bradford),1900
4. The Geology of Yorkshire;Kendall,1924
5. The Faunal Succession in the Carboniferous Limestone and Bowland Shales at Clitheroe and Pendle Hill;Parkinson;Quart. Journ. Geol. Soc.,1926