Cite

State of Idaho / compiled by R.H. Morton.

MLA

Morton, Robert H. State of Idaho / Compiled by R.H. Morton. General Land Office, 1899. https://collections.library.yale.edu/catalog/15818329.

APA, 6th edition

Morton, R. H. (1899). State of Idaho / compiled by R.H. Morton. [Maps]. General Land Office, https://collections.library.yale.edu/catalog/15818329.