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| 2 | Wilson., M.J. 1987. A handbook of Determinative Methods in Clay Mineralogy, published in the USA by Chapman Hall, New YORK. |
| 3 | Inglethorpe,S D J.1993, British Geological Survey.,TECHNICAL REPORT WG/92/39 Mineralogy and Petrology Series Industrial Minerals Laboratory Manual |
| 4 | Rollison., Hugh., (1993); Using geochemical data, Longman Group UK Ltd. |
| 5 | A J Blood worth, D E Highley and C J Mitchell. 1993, British Geological Survey. TECHNICAL REPORT WG/93/1 Mineralogy and Petrology Series Industrial Minerals Laboratory Manual KAOLIN |
| 6 | S D J Inglethorpe, D J Morgan, D E Highley and A J Blood worth, 1993.British Geological Survey.Industrial Minerals Laboratory Manual BENTONITE |
| 7 | PhD course notes. |