Hydromatic Quick-Feathering propellers : service manual / Hamilton Standard Propellers, Division of United Aircraft Corporation Specification NS 85-Nertherlands for attack bomber airplane model 8A-3N / Douglas Aircraft Co. Scientific handicraft : an illustrated and descriptive catalogue of scientific apparatus manufactured and sold by John J. Griffin & Sons, makers of scientific instruments service instructions Model 4 synchronizer : service instructions / Hamilton Standard Propellers, division of United Aircraft Corporation Hazemeyer's N.V. Hollandsche Signaalapparaten. Preliminary report of demonstrations of the anti-aircraft fire control equipment, Type signal L 4/3 Ansaldo. War material, 75 mm/46 antiaircraft gun Arenco. Modernization of antiaircraft guns with Arenco elecrtonic servo for : 10.5cm, 40mm akan L 60, 40mm akan m/3636 Contraves and Microlambda. The Falcon, A complete fire control equipment for light anti-aircraft batteries, Under conditions of good visibility Douglas Aircraft Company. Technical data, Air corps standard parts book Douglas Aircraft Company. Type C-4, Fixed gun sights Douglas Aircraft Company. Technical data, Douglas standard parts Douglas Aircraft Company. Model 8A3N, Fuselage, Appedix - report no. 532, December 29 1939