28th June 2006, 11:30 AM
Thewre is a definition of stratigraphic phasing in Harris 1979 'Principles of archaeological stratigraphy'p.158 and a discussion of gropuping stratigraphy in Roskams 2001 ' Excavation'pp257-261. There are of course the numerous useful papers resulting from the stratigraphy conference papers. Ceramic periods/ phasing is discussed in Monaghan 1997 ' Roman pottery from York' p 860,