- Mary Harrison, Barnard Castle: diary incl references to Strathmore family and estates 1788-92 (D/X 1416/1)
- WD & R Allison & Sons, building contractors, Whitburn: records 19th-20th cent
- Consett Iron Co Ltd, colliery and limestone quarry owners, iron and steel manufacturers (addnl): records
- Aycliffe Young Peoples Centre: records 20th cent
- Durham and Teesdale Community Health Council: records 20th cent
- Durham Bluecoat School: records 18th-20th cent
- Durham County Brass Band League: records c1960-99
- Durham County Womens Institutes (addnl): records
- Durham Dramatic Society (addnl): records
- Durham Light Infantry (addnl): records 19th-20th cent
- Houghall Horticultural Station: meteorological registers 1925-51
- North Durham Community Health Council: records 20th cent
- Shotley Bridge General Hospital: financial records 20th cent
- South Durham and Weardale Community Health Council: records 20th cent
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