1. IOR/V/27/422/10 Reference (shelfmark): IOR/V/27/422/10 Title: India. Survey of India, Notes on the 'Vandyke' or direct zinc printing process, with details of apparatus and chemicals required for a small section. Calcutta, 1913 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1913 Extent: 1 volume