Lloyd's Register 1934, SOL. Lloyd's Register of Shipping(PDF). Vol. II.–Steamers and Motorships of 300 Tons Gross and Over. London: Lloyd's Register of Shipping. 1934 – via Southampton City Council.
thegreatoceanliners.com
Reimertz, Henrik (21 March 2018). "Potsdam". The Great Ocean Liners. Retrieved 15 May 2023.
theyard.info
"Rijndam". Harland & Wolff The Yard. Retrieved 15 May 2023.
"Noordam". Harland & Wolff The Yard. Retrieved 15 May 2023.