Bell Helicopter--Erection and Maintenance Manual. Niagra Falls, NY: Bell Aircraft Corporation, 1948. 1st edition. 2 volumes: 265+39pp 4to. Plasticized boards Very good condition. Scarce, hyper-illustrated and early treatment of the Bell helicopter. Comes with "Bell Aircraft Corporation Helicopter training School, Pilot's Outline" 1947. $400.00


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