Books by Alvin J Walker
A National Electrical Code Study Reference Based on the 2008 NEC
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Electrical Theory: Simply Explained-Thoroughly Understood
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A National Electrical Code Study Reference Based on the 2011 NEC
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The 2011 National Electrical Code Book of In-Depth Calculations - Volume 1
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The 2011 National Electrical Code Book of In-Depth Calculations - Volume 3
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The 2011 National Electrical Code Book of In-Depth Calculations - Volume 2
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The 2011 National Electrical Code Book of In-Depth Calculations - Volume 4
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