Cite

Montana Territory / compiled from the official records of the General Land Office and other sources by C. Roeser, principal draughtsman G.L.O.

MLA

Office, United States. General Land. Montana Territory / Compiled from the Official Records of the General Land Office and Other Sources by C. Roeser, Principal Draughtsman G.L.O. General Land Office, 1879. https://collections.library.yale.edu/catalog/15814912.

APA, 6th edition

Office, U. S. G. L. (1879). Montana Territory / compiled from the official records of the General Land Office and other sources by C. Roeser, principal draughtsman G.L.O. [Maps]. General Land Office, https://collections.library.yale.edu/catalog/15814912.