1. Field Guide to the Gipping and Waveney Valleys, Suffolk (May 1982),1984
2. The tills of southern East Anglia;Allen,1991
3. Techniques of Till Fabric Analysis;Andrews,1971
4. Field meeting to Ayot Green and Hatfield;Anonymous;Transactions of the Hertfordshire Natural History Society and Field Club,1908
5. Munsell Soil Color Charts;Anonymous,1954