1. Procedures in Sedimentary Petrology;Carver,1971
2. Trace elements in sediments from the Lower Severn Estuary and Bristol Channel;Chester;Mar. Pollut. Bull.,1975
3. The Petrology of Sedimentary Rocks;Folk,1974
4. Soil Chemical Analysis;Jackson,1958
5. Trace metal extraction of soils and sediments by nitric acid-hydrogen peroxide;Krishnamurty;Atomic Absorption Newsletter,1976