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Document Designation and Title Year Select Item(s) D4890 Standard Test Methods for Polyurethane Raw Materials: Determination of Gardner and APHA Color of Polyols 06 D4890 Standard Test Methods for Polyurethane Raw Materials: Determination of Gardner and APHA Color of Polyols 98(2003) D4890 Standard Test Methods for Polyurethane Raw Materials Determination of Gardner and APHA Color of Polyols 98