1. IOR/L/E/7/1251, File 3 Reference (shelfmark): IOR/L/E/7/1251, File 3 Title: File 3 Department of Scientific and Industrial Research - Standardisation Marks of the National Physical Laboratory - As to protection in India Collection Area: India Office Records and Private Papers Languages: English Date Range: 24 Feb 1920-17 Aug 1922 Extent: 1 file