Railroad map of Ohio : Published by the state / prepared under the direction of R.S. Kayler commissioner of railroads and telegraphs.
MLA
Kayler, R. S. Railroad Map of Ohio : Published by the State / Prepared under the Direction of R.S. Kayler Commissioner of Railroads and Telegraphs. State of Ohio, 1899. https://collections.library.yale.edu/catalog/15814348.
APA, 6th edition
Kayler, R. S. (1899). Railroad map of Ohio : Published by the state / prepared under the direction of R.S. Kayler commissioner of railroads and telegraphs. [Maps]. State of Ohio, https://collections.library.yale.edu/catalog/15814348.
