| Reference | {Deposit:: GREENWOOD, D. A., FLUORSPAR MINING IN THE NORTHERN PENNINES,}{Deposit:: INSTITUTE OF MINING AND METALLURGY, TRANSACTIONS, SECT. B,}{Deposit:: NOV. 1977, P. B181-B189.}{Deposit:: BLUNDEN, J., THE MINERAL RESOURCES OF BRITAIN. A STUDY IN}{Deposit:: EXPLOITATION AND PLANNING, HUTCHISON AND COMPANY, LONDON,}{Deposit:: 1975.} |