11. IOR/V/27/422/11 Reference (shelfmark): IOR/V/27/422/11 Title: Tandy, M O'C, A consideration of the contour intervals and colour scales best suited to Indian 1/M maps. Calcutta, 1913 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1913 Extent: 1 volume
12. IOR/V/27/422/12 Reference (shelfmark): IOR/V/27/422/12 Title: India. Survey of India, The reproduction of maps, plans, photographs, diagrams and line illustrations by the Survey of India and other departments. Calcutta, 1914 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1914 Extent: 1 volume
13. IOR/V/27/422/13 Reference (shelfmark): IOR/V/27/422/13 Title: Hedley, W C, Notes on the organisation, methods and processes of the Photo-Litho Office, Calcutta. 3rd edition. Calcutta, 1924 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1924 Extent: 1 volume
14. IOR/V/27/422/14 Reference (shelfmark): IOR/V/27/422/14 Title: India. Survey of India, Glossary of vernacular terms used on Survey of India maps. Calcutta, 1931 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1931 Extent: 1 volume