1. Code of Stratigraphic Nomenclature;American Commission on Stratigraphic Nomenclature;Am. Assoc. Petrol. Geol. Bull.,1961
2. A calcimeter for routine analysis of soil samples;Bascomb;Chemy Ind.,1961
3. Magnetic susceptibility of late Weichselian deposits in Southeastern Sweden;Björck;Boreas,1982
4. Bloemendal , J. 1982 The quantification of rates of total sediment influx to Llyn Goddionduon, Gwynedd