Cite

Flamm's index map Baltimore.

MLA

Flamm, Wm. A., and Co. Flamm's Index Map Baltimore. Wm.A. Flamm, 0AD. https://collections.library.yale.edu/catalog/15827561.

APA, 6th edition

Flamm, W. A., & C. (0 C.E.). Flamm's index map Baltimore. [Maps]. Wm.A. Flamm, https://collections.library.yale.edu/catalog/15827561.