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Document Designation and Title Year Select Item(s) D4647 Standard Test Method for Identification and Classification of Dispersive Clay Soils by the Pinhole Test 06e1 D4647 Standard Test Method for Identification and Classification of Dispersive Clay Soils by the Pinhole Test 93(2006) D4647 Standard Test Method for Identification and Classification of Dispersive Clay Soils by the Pinhole Test 06 D4647 Standard Test Method for Identification and Classification of Dispersive Clay Soils by the Pinhole Test 93(1998)e1