Chart of St. Clair Flats showing the positions of light house & beacon : now in course of erection and the channel excavated in 1857 & 1858 under the direction of Capt. A.W. Whipple, Corps of Topl. Engineers : the new channel was surveyed on the 6th & 7th
MLA
of Topographical Engineers, United States. Army. Corps. Chart of St. Clair Flats Showing the Positions of Light House & Beacon : Now in Course of Erection and the Channel Excavated in 1857 & 1858 under the Direction of Capt. A.W. Whipple, Corps of Topl. Engineers : the New Channel Was Surveyed on the 6th & 7th. Engraved in the Engineer Bureau, 0AD. https://collections.library.yale.edu/catalog/15814506.
APA, 6th edition
of Topographical Engineers, U. S. A. C. (0 C.E.). Chart of St. Clair Flats showing the positions of light house & beacon : now in course of erection and the channel excavated in 1857 & 1858 under the direction of Capt. A.W. Whipple, Corps of Topl. Engineers : the new channel was surveyed on the 6th & 7th [Maps]. Engraved in the Engineer Bureau, https://collections.library.yale.edu/catalog/15814506.