State of Mississippi : compiled from the official records of the General Land Office and other sources, under supervision of A.F. Dinsmore, Principal Draughtsman G.L.O. / compiled and drawn by Robert H. Morton.
MLA
Morton, Robert H. State of Mississippi : Compiled from the Official Records of the General Land Office and Other Sources, under Supervision of A.F. Dinsmore, Principal Draughtsman G.L.O. / Compiled and Drawn by Robert H. Morton. General Land Office, 1890. https://collections.library.yale.edu/catalog/15811423.
APA, 6th edition
Morton, R. H. (1890). State of Mississippi : compiled from the official records of the General Land Office and other sources, under supervision of A.F. Dinsmore, Principal Draughtsman G.L.O. / compiled and drawn by Robert H. Morton. [Maps]. General Land Office, https://collections.library.yale.edu/catalog/15811423.
