chapter published in 1986

article published in 1979

article published in March 1978

article by Carolyn M. Heighway et al published 1980 in Britannia

article by Peter Addyman et al published September 1974 in Antiquaries Journal

chapter of Twenty-Five Years of Archaeology in Gloucestershire published in 2006

scholarly article by Carolyn M. Heighway published in September 1987

scientific article published in January 1993

article published in 1980

book published in 1973

book published in 1999

scientific article published in 1982

scholarly article by Steve Bagshaw published in January 2004

book published in 2007