Cite

Index chart of the northern and northwestern lakes : compiled from the data of the U.S. Survey and showing the names and limits of the published charts / compiled and drawn by Edward Molitor.

MLA

Survey, U. S. Lake. Index Chart of the Northern and Northwestern Lakes : Compiled from the Data of the U.S. Survey and Showing the Names and Limits of the Published Charts / Compiled and Drawn by Edward Molitor. U.S. Lake Survey], 1885. https://collections.library.yale.edu/catalog/15952140.

APA, 6th edition

Survey, U. S. L. (1885). Index chart of the northern and northwestern lakes : compiled from the data of the U.S. Survey and showing the names and limits of the published charts / compiled and drawn by Edward Molitor. [Maps]. U.S. Lake Survey], https://collections.library.yale.edu/catalog/15952140.