U-Boats of WW1

Essential Tools

• To study WW1 U-boat covers you need:

• Postal markings of the German U-boats WW1, by John Leathes, FPHS 1997

• Deutsche Marine Schiffspost 1914-1918, by Clausen

• http://www.uboat.net/ - great website

U-Boats of WW1.pdf

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