Harborough Rocks Cave - additional information
References
(1923) , Jour. Roy. Anthrop. Trust. Vol.53., pp.402-16. Survey.,
(1929) , Naturalist., pp.105-107.,
(1988) , D.C.A. N/L No.67., pp.11-13. Survey., Derbyshire Caving Association
(2010) , Caves of the Peak District, p. 153, DCA