Cite

Hamilton and Herkimer counties.

MLA

Bien, Joseph R. Hamilton and Herkimer Counties. Julius Bien & Co., 0AD. https://collections.library.yale.edu/catalog/15753397.

APA, 6th edition

Bien, J. R. (0 C.E.). Hamilton and Herkimer counties. [Maps]. Julius Bien & Co., https://collections.library.yale.edu/catalog/15753397.