Institution of Mechanical Engineers (Great Britain), Institution of Electrical Engineers, & Institution of Mechanical Engineers (Great Britain). Power Industries Division. (1981). Developments in variable speed drives for fluid machinery: Conference sponsored by the Power Industries Division of the Institution of Mechanical Engineers and the Institution of Electrical Engineers, 9 June 1981, Institution Headquarters, 1 Birdcage Walk, Westminster, London. Published by Mechanical Engineering Publications for the Institution of Mechanical Engineers.

Institution of Mechanical Engineers (Great Britain), Institution of Electrical Engineers, and Institution of Mechanical Engineers (Great Britain). Power Industries Division. Developments in Variable Speed Drives for Fluid Machinery: Conference Sponsored by the Power Industries Division of the Institution of Mechanical Engineers and the Institution of Electrical Engineers, 9 June 1981, Institution Headquarters, 1 Birdcage Walk, Westminster, London. London: Published by Mechanical Engineering Publications for the Institution of Mechanical Engineers, 1981.

Institution of Mechanical Engineers (Great Britain), et al. Developments in Variable Speed Drives for Fluid Machinery: Conference Sponsored by the Power Industries Division of the Institution of Mechanical Engineers and the Institution of Electrical Engineers, 9 June 1981, Institution Headquarters, 1 Birdcage Walk, Westminster, London. Published by Mechanical Engineering Publications for the Institution of Mechanical Engineers, 1981.