U.S. Coast and Geodetic Survey, Jones, Ernest Lester, 1876-1929 · Washington : Govt. Print. Off. · leaf 44
Special Publication No. 38. … Fig. 10.—1 HEODOLITE, USED IN THE HIGHEST CLASS OF TRIANGULATION WHERETHE DISTANCES BETWEEN STATIONS ARE OFTEN 100 MILES OR MORE. Special Publication No. 33.
Charts, diagrams, etc
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
