Saint Lawrence River chart no. 4 : projected from trigonometrical surveys / executed under the orders of Major C. B. Comstock, Corps of Engineers, Brvt. Brigadier Gen. U.S.A. in 1871, 1872 and 1873 ; Topography and rest of hydrography by Assistants A.C. L
MLA
Survey, U. S. Lake. Saint Lawrence River Chart No. 4 : Projected from Trigonometrical Surveys / Executed under the Orders of Major C. B. Comstock, Corps of Engineers, Brvt. Brigadier Gen. U.S.A. in 1871, 1872 and 1873 ; Topography and Rest of Hydrography by Assistants A.C. L. Corps of Engineers, 1876. https://collections.library.yale.edu/catalog/15535999.
APA, 6th edition
Survey, U. S. L. (1876). Saint Lawrence River chart no. 4 : projected from trigonometrical surveys / executed under the orders of Major C. B. Comstock, Corps of Engineers, Brvt. Brigadier Gen. U.S.A. in 1871, 1872 and 1873 ; Topography and rest of hydrography by Assistants A.C. L [Maps]. Corps of Engineers, https://collections.library.yale.edu/catalog/15535999.