Berlin Blockade
Sources
The Berlin Airlift, 1948-1949, U.S. Department State: Office of the Historian
The Berlin blockade and airlift, BBC Bitesize Guide
Berlin Blockade, PBS: American Experience
Benn Steil, The Marshall Plan: Dawn of the Cold War(Simon & Schuster, 2018)
Barry Turner, The Berlin Airlift: The Relief Operation that Defined the Cold War (Icon Books, 2017)