20 & 20A South Street, Durham City (Durham City) - Source of Reference
| No. | Originator(s) | Date | Title | Notes |
|---|---|---|---|---|
| 1 | Department of Archaeology Durham University | 1991 | Urban Archaeological Database | |
| 2 | Department of Archaeology Durham University | 1988 to 1991 | Durham City Archaeological Conservation Management Project Archive | |
| 3 | Department of Environment, English Heritage, Historic Buildings and Monuments Commission | 1950 | List of buildings of special architectural or historic interest, also known as "Greenbacks" | LB Volume, Map & Item: 1914, 14, 443 |
| 4 | 20 & 20A South Street, Durham | |||
| 5 | 20 & 20A South Street, Durham | |||
| 6 | Department of Archaeology Durham University, Durham City Council, English Heritage | Jan-1992 | Durham City Archaeological Conservation and Management Project Summary report | Further work recommended |
| 7 | Ryder, P | 1991 | Buildings Survey, 1990-1991 | p 134 |
| 8 | Ryder, P | 11-Dec-1990 to 25-Feb-1991 | Durham Buildings Survey - Fieldbook 2 | p 80-81, 100 |
| 9 | Roberts, M, Pevsner, N, Williamson, E, Yale University Press | 2021 | The Buildings of England County Durham | page 362 |
| 10 | Durham County Council | Jul-2016 | Conservation Area Appraisal: Character Area 3, Crossgate (Durham City) | pages 90 & 99 |