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A SUMMARY OF THE MINERAL RESOURCES OF THE "CROFTER COUNTIES" OF SCOTLAND, COMPRISING ARGYLLSHIRE, CAITHNESS, INVERNESS-SHIRE, ORKNEY AND SHETLAND, ROSS AND CROMARTY, AND SUTHERLAND.BERRIDGE NG.1969; NATUR.ENVIRONM.RES.COUNCIL.INST.GEOL.SCI.REP-G.B.; 1969, P. 1 A 36Miscellaneous

THE GEOLOGY OF THE NANT HYDRO-ELECTRIC TUNNELS.HARRIS AL; BERRIDGE NG.1969; BULL. GEOL. SURV. G.B.; GBR; 1969, NUM. 0030, P. 99 A 114Miscellaneous

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