Citations are generated automatically from bibliographic data as
a convenience, and may not be complete or accurate.
Chicago citation style:
Glassford, William A, A. W Greely, and United States Army. Signal Corps. Map of the island of Porto Rico showing the lines of signal communication, telegraph, telephone, and heliograph, operated by the Signals Corps, U.S. Army, with military posts. [S.l, 1900] Map. https://www.loc.gov/item/98687139/.
APA citation style:
Glassford, W. A., Greely, A. W. & United States Army. Signal Corps. (1900) Map of the island of Porto Rico showing the lines of signal communication, telegraph, telephone, and heliograph, operated by the Signals Corps, U.S. Army, with military posts. [S.l] [Map] Retrieved from the Library of Congress, https://www.loc.gov/item/98687139/.
MLA citation style:
Glassford, William A, A. W Greely, and United States Army. Signal Corps. Map of the island of Porto Rico showing the lines of signal communication, telegraph, telephone, and heliograph, operated by the Signals Corps, U.S. Army, with military posts. [S.l, 1900] Map. Retrieved from the Library of Congress, <www.loc.gov/item/98687139/>.