Cite

The Thebes Bridge, Mississippi River. Between Thebes, Illinois, and Gray's Point, Missouri (GFB-68-932)

MLA

Plowden, David. The Thebes Bridge, Mississippi River. Between Thebes, Illinois, and Gray's Point, Missouri (GFB-68-932). 1968. https://collections.library.yale.edu/catalog/2041116.

APA, 6th edition

Plowden, D. (1968). The Thebes Bridge, Mississippi River. Between Thebes, Illinois, and Gray's Point, Missouri (GFB-68-932). https://collections.library.yale.edu/catalog/2041116.