Mother Grundy's Parlour - additional information
References
() , Trans. Manch. Geol. Soc. Vol.XV., pp.290-314.,
(1913) Geological Survey Memoir, The Northern Part of the Derbyshire Coalfield. , p.108. ,
(1970) , Peakland Arch. Soc. Bull. No.25., pp.13-15. Survey.,
(2010) , Caves of the Peak District, p. 251, DCA