Map of Maryland and the District of Columbia, colored to illustrate the geological formations by Philip T. Tyson. L.E. Neuman, eng. , 36 Vesey St., N.Y. (Published by Stedman, Brown & Lyon, Baltimore. 1873)New topographical atlas of the State of Maryland and the District of Columbia. With descriptions historical, scientific, and statistical, together with maps of the United States and Territories. By S.J. Martenet, H.F. Walling, and O.W. Gray, civil and topographical engineers. Published by Stedman, Brown & Lyon, Baltimore. 1873. (on verso) Entered ... 1872, by H.F. Walling, and O.W. Gray, and Simon J. Martenet ... WashingtonMap of Maryland and the District of Columbia geological formations

Chicago citation style
Tyson, Philip T, Neuman, Louis E, Gray, Ormando Willis, Lloyd, H.H, Martenet, Simon J, Walling, H. F. Map of Maryland and the District of Columbia, colored to illustrate the geological formations by Philip T. Tyson. L.E. Neuman, eng. , 36 Vesey St., N.Y. (Published by Stedman, Brown & Lyon, Baltimore. 1873),New topographical atlas of the State of Maryland and the District of Columbia. With descriptions historical, scientific, and statistical, together with maps of the United States and Territories. By S.J. Martenet, H.F. Walling, and O.W. Gray, civil and topographical engineers. Published by Stedman, Brown & Lyon, Baltimore. 1873. (on verso) Entered ... 1872, by H.F. Walling, and O.W. Gray, and Simon J. Martenet ... Washington,Map of Maryland and the District of Columbia geological formations. 1873. Retrieved from the Digital Public Library of America, https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~28718~1120955. (Accessed December 17, 2018.)
APA citation style
Tyson, Philip T, Neuman, Louis E, Gray, Ormando Willis, Lloyd, H.H, Martenet, Simon J, Walling, H. F, (1873) Map of Maryland and the District of Columbia, colored to illustrate the geological formations by Philip T. Tyson. L.E. Neuman, eng. , 36 Vesey St., N.Y. (Published by Stedman, Brown & Lyon, Baltimore. 1873),New topographical atlas of the State of Maryland and the District of Columbia. With descriptions historical, scientific, and statistical, together with maps of the United States and Territories. By S.J. Martenet, H.F. Walling, and O.W. Gray, civil and topographical engineers. Published by Stedman, Brown & Lyon, Baltimore. 1873. (on verso) Entered ... 1872, by H.F. Walling, and O.W. Gray, and Simon J. Martenet ... Washington,Map of Maryland and the District of Columbia geological formations. Retrieved from the Digital Public Library of America, https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~28718~1120955
MLA citation style
Tyson, Philip T, Neuman, Louis E, Gray, Ormando Willis, Lloyd, H.H, Martenet, Simon J, Walling, H. F. Retrieved from the Digital Public Library of America <https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~28718~1120955>.
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