Account of the Operations of the Great Trigonometrical Survey of India, Vol 9, Electro-telegraphic longtitude operations executed during the years 1875-77 and 1880-81 by Lt Col W.M. Campbell and Major W.J. Heaviside. J.T. Walker. Dehra Dun, 1883
Account of the Operations of the Great Trigonometrical Survey of India, Vol 10, Electro-telegraphic longtitude operations executed during the years 1881-82, 1882-83 and 1883-84 by Major G. Strahan and Major W.J. Heavisids. C.T. Haig. Dehra Dun, 1887
Account of the Operations of the Great Trigonometrical Survey of India, Vol 17, Electro-telegraphic longtitude operations executed during the years 1894-95-96 [and] The Indo-European arcs from Karachi to Greenwich. S.G. Burrard. Dehra Dun, 1901
Account of the Operations of the Great Trigonometrical Survey of India, Vol 6, The Principal Triangulation of the South-East Quadrilateral, including the Great Arc, section 18° to 24°, the East Coast series, the Calcutta and the Bider Longtitudinal series, the Jabalpur and the Bilaspur Meridional series, and the details of their simultaneous reduction. J.T. Walker. Dehra Dun, 1880
Account of the Operations of the Great Trigonometrical Survey of India, Vol 11, Astronomical observations for latitude made during the period 1805 to 1885 with a general description of the operations and their final results. G. Strahan. Dehra Dun, 1890
Account of the Operations of the Great Trigonometrical Survey of India, Vol 15, Electro-telegraphic operations executed during the years 1885-86, 1887-88, 1889-90 and 1891-92 and the revised results of arcs contained in Vols 9 and 10; also the simultaneous reduction and the final results of the whole of the operations. G. Strahan. Dehra Dun, 1893
Account of the Operations of the Great Trigonometrical Survey of India, Vol 18, Astronomical observations for latitude made during the period 1885 to 1905 and the deduced values of the deflections of the plumb-line. S.G. Burrard. Dehra Dun, 1906
Account of the Operations of the Great Trigonometrical Survey of India, Vol 1, The standards of measure and the base-lines; also an introductory account of the early operations of the Survey during the period 1800-1830. J.T. Walker. Dehra Doon, 1870
Account of the Operations of the Great Trigonometrical Survey of India, Vol 2, History and general description of the principal triangulation and of its reduction. J.T. Walker. Dehra Dun, 1879