Commer. Spare parts list for lorry 3 ton 4x2 G.S., model Q.4, Publication no. 267 Deutsche Plastoskop-Geselschaft Wendt & co. Modelos matemáticos "Plastoscopio" Diamond T. Parts list, 4 ton 6x6, Models 969B, 975 & 975A Douglas Aircraft Company. Demonstration Flight Tests Model 8A-3N #531, Report #589, October 1939 Douglas Aircraft Company. Finish specification, F.S. 16, Attack bomberairplane model 8A-3N Douglas Aircraft Company. Model 8A-3N, Report no. 588, Airplane vibration characteristics Douglas Aircraft Company. Model 8A-3N, Bill of material Douglas Aircraft Company. Report #1064, Model 8A-3N (#548) actual weight and balance, November 156 1939 Douglas Aircraft Company. Supplimantary numerical drawing list model 8A-3N Douglas Aircraft Company. Numerical drawing list, Model 8A-3N airplane Douglas Aircraft Company. Report #1063, Model 8A-3N (#540), Actual weight & balance, Nov. 10, 1939 Douglas Aircraft Company. Report #1049, Actual weight and balance, Model 8A-3N (ship #531), Aug. 21, 1939