Tidwell. Boeing's only narrow-body airliner currently in production, the 737 entered service in 1968 and is the best-selling jet airliner in the history of aviation. Having developed into a family of nine passenger models, there are, on average, 1,250 737s airborne at any given time. This volume examines the 737 and its variants in complete detail, including their design and development, service history and technical data. 96 pages; 220+ B&W and color photographs, line drawings, and color profiles; 11"x 8½"; softcover. #0030340