1860-1877 Great Trigonometrical Survey of India General Reports 1862 General Report on Operations of GTS of India during 1860-62 s (missing pages).pdf 780.33 KB 1863 General Report on Operations of GTS of India during1862-63 s.pdf 2.46 MB 1866 General Report on the GTS of India for 1864-65 s.pdf 3.35 MB 1867 General Report on Operations of GTS of India during 1866-67 s.pdf 7.55 MB 1868 General Report on Operations of GTS of India during 1867-68 s.pdf 6.67 MB 1869 General Report on Operations of GTS of India during 1868-69 s.pdf 5.45 MB 1870 Report on GTS of India during 1869-70 (5 Surveys) s.pdf 915.55 KB 1871 General Report on Operations of GTS of India during 1870-71 s.pdf 9.29 MB 1872 General Report on Operations of GTS of India during 1871-72 s.pdf 9.89 MB 1873 General Report of Operations of GTS of India during 1872-73 s.pdf 11.84 MB 1874 General Report on Operations of GTS of India during 1873-74 s.pdf 12.29 MB 1877 General Report on Operations of GTS of India during 1875-76 s.pdf 9.33 MB 1878 General Report on Operations of GTS of India during 1876-77 s.pdf 13.71 MB