1. IOR/X/12131/9 Reference (shelfmark): IOR/X/12131/9 Title: Details of extract duct, 3rd Floor Wing Block, (West Section) Scope & Content: Produced by H. J. Cash and Company Ltd., Bexley Sheet Metals Ltd., Woolwich, London. Collection Area: Map Collections Languages: English Date Range: 1967 Extent: 1 sheet