Cite

Nelson B. Williams, Esq., Bedford, N.Y., topography

MLA

Fowler, Frank G., and cartographer. Nelson B. Williams, Esq., Bedford, N.Y., Topography. 0AD. https://collections.library.yale.edu/catalog/16600390.

APA, 6th edition

Fowler, F. G., & cartographer. (0 C.E.). Nelson B. Williams, Esq., Bedford, N.Y., topography [Maps, Manuscript maps]. https://collections.library.yale.edu/catalog/16600390.