Printed notice of the Treasury Department titled, "Persons Allowed in Pilothouse and on Navigation Bridge," 1953, D00603. Missouri Historical Society Library and Research Center.

Printed notice of the Treasury Department titled, "Persons Allowed in Pilothouse and on Navigation Bridge," 1953, D00603. Missouri Historical Society Library and Research Center. https://mohistory.mobiusconsortium.org/repositories/2/digital_objects/3321 Accessed September 19, 2024.