Development of aircraft engines [by] Robert Schlaifer [and] Development of aviation fuels [by] S. D. Heron; Two studies of relations between government and business. Development of aviation fuels. Schlaifer, Robert. Heron, S. D. Development of aviation fuels. Airplanes Motors. Motor fuels. Science and state. Research, Industrial. TL701.1 .S35 658.01 MUG On spine: Development of aircraft engines and fuels. Boston, Division of Research, Graduate School of Business Administration, Harvard University, 1950. 1950. 1950 Text xviii, 754 p. eng