1. IOR/V/19/221 Reference (shelfmark): IOR/V/19/221 Title: Survey of India Professional Paper No. 14, Formulae for atmospheric refraction and their application to terrestial refraction and geodesy. J. de Graaf Hunter. Dehra Dun, 1913 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1913 Extent: 1 volume