Account of the Operations of the Great Trigonometrical Survey of India, Vol 19A, Descriptions and heights of bench-marks on the southern lines of levelling. S.G. Burrard. Dehra Dun, 1910
Account of the Operations of the Great Trigonometrical Survey of India, Vol 19B, Descriptions and heights of bench-marks on the northern lines of levelling. S.G. Burrard. Dehra Dun, 1910