Cite

Swiss Federal Railways tourist map of Switzerland / Geogr. Establishment Kümmerly & Frey.

MLA

Kümmerly + Frey. Swiss Federal Railways tourist map of Switzerland / Geogr. Establishment Kümmerly & Frey.. BRBL_00149. 1909. https://collections.library.yale.edu/catalog/15826882.

APA, 6th edition

Kümmerly + Frey. (["BRBL_00149"])(1909)[Swiss Federal Railways tourist map of Switzerland / Geogr. Establishment Kümmerly & Frey.]. https://collections.library.yale.edu/catalog/15826882.