	Authors	Year	Title
	Bisat	1950	The junction faunas of the Viséan and Namurian. Transactions of the Leeds Geologists Association., 6 (3): 10-26, fig.1, pl.1,2; Kendal.
	Moore	1936	The Bowland Shales from Pendle to Dinckley. Journal of the Manchester Geological Association,: 167-192, fig.1-3, pl.1-3; Manchester.