Saint Lawrence River chart no. 2 : projected from trigonometrical surveys / executed under the orders of Major C. B. Comstock, Corps of Engineers, Brvt. Brigadier General U.S.A. in 1871, 1872 and 1873 ; Hydrography of Galop Rapids by Lieut. W.R. Livermore
MLA
Survey, U. S. Lake. Saint Lawrence River Chart No. 2 : Projected from Trigonometrical Surveys / Executed under the Orders of Major C. B. Comstock, Corps of Engineers, Brvt. Brigadier General U.S.A. in 1871, 1872 and 1873 ; Hydrography of Galop Rapids by Lieut. W.R. Livermore. Corps of Engineers, 1873. https://collections.library.yale.edu/catalog/15535996.
APA, 6th edition
Survey, U. S. L. (1873). Saint Lawrence River chart no. 2 : projected from trigonometrical surveys / executed under the orders of Major C. B. Comstock, Corps of Engineers, Brvt. Brigadier General U.S.A. in 1871, 1872 and 1873 ; Hydrography of Galop Rapids by Lieut. W.R. Livermore [Maps]. Corps of Engineers, https://collections.library.yale.edu/catalog/15535996.