Cite

Map of Allegany County showing the topography and election districts. / Maryland Geological Survey, in cooperation with U.S. Geological Survey.

MLA

Survey, Maryland Geological. Map of Allegany County Showing the Topography and Election Districts. / Maryland Geological Survey, in Cooperation with U.S. Geological Survey. Maryland Geological Survey, 1900. https://collections.library.yale.edu/catalog/15811186.

APA, 6th edition

Survey, M. G. (1900). Map of Allegany County showing the topography and election districts. / Maryland Geological Survey, in cooperation with U.S. Geological Survey. [Maps]. Maryland Geological Survey, https://collections.library.yale.edu/catalog/15811186.