BRITAIN'S SHIELD: Radar and the Defeat of the Luftwaffe
David Zimmerman is Professor of Military History at the University of Victoria, Victoria, British Columbia, Canada. He is an expert in the history of science, technology and war, the history of radar, anti-submarine warfare, the Royal Canadian Navy, and the rescue of refugee academics from Germany.   His books include: Top Secret Exchange: The Tizard Mission and the Scientific War, and The Great Naval Battle of Ottawa.