Cite

Putnam, Windham County, Connecticut.

MLA

Sanborn Map Company, issuing body. Putnam, Windham County, Connecticut. 1920. https://collections.library.yale.edu/catalog/11594410.

APA, 6th edition

Sanborn Map Company, issuing body. (1920). Putnam, Windham County, Connecticut. [Atlases--Connecticut--Putnam--1920, Cadastral maps--Connecticut--Putnam--1920, Fire insurance maps--Connecticut--Putnam--1920]. https://collections.library.yale.edu/catalog/11594410.