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Document Designation and Title Year Select Item(s) B457 Standard Test Method for Measurement of Impedance of Anodic Coatings on Aluminum 67(2008)e1 B457 Standard Test Method for Measurement of Impedance of Anodic Coatings on Aluminum 67(2003) B457 Standard Test Method for Measurement of Impedance of Anodic Coatings on Aluminum 67(1998)