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3. The Dartmoor granites: their genetic relationships;Brammall;Q.J. Geol. Soc. London,1932
4. Atomic absorption analyses of 18 elements from a single decomposition;Buckley;Chem. Geol.,1971
5. Soils of the Exeter district;Clayden;Mem. Soil Surv. G.B.,1971