Trials with HM Submarine Seraph and British preparations to defeat the type XXI U-boat, September-October 1944.
Llewellyn-Jones, M. — 2000
Author Llewellyn-Jones, M.
Date 2000
Publisher The Mariner’s Mirror, 86.4: 434-451
Location Maritime Museum
Geographic UK
Main Boats/ships–History of
Second Submarines
Chrono 20Cent