United States. Army. Corps of Engineers. Louisville District. Navigation charts, Ohio River, Louisville district, Cairo, Illinois to Foster, Kentucky. Army Corps of Engineers.
Chicago Style (17th ed.) CitationUnited States. Army. Corps of Engineers. Louisville District. Navigation Charts, Ohio River, Louisville District, Cairo, Illinois to Foster, Kentucky. Louisville, Ky.: Army Corps of Engineers.
MLA (9th ed.) CitationUnited States. Army. Corps of Engineers. Louisville District. Navigation Charts, Ohio River, Louisville District, Cairo, Illinois to Foster, Kentucky. Army Corps of Engineers.
Warning: These citations may not always be 100% accurate.