All 1 David William Spitzer releases on Paperback Bo... Book
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![Cover for David William Spitzer · Variable Speed Drives: Principles and Applications for Energy Cost Savings (Paperback Book) [Fourth edition] (2012)](https://imusic.b-cdn.net/images/item/original/638/9781606503638.jpg?david-william-spitzer-2012-variable-speed-drives-principles-and-applications-for-energy-cost-savings-paperback-book&class=scaled&v=1408811054)