ASTM Standard D698, (2007), Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort, ASTM International, West Conshohocken, PA, DOI: 10.1520/D0698-07E01
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ASTM Standard D1557, (2009), Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort, ASTM International, West Conshohocken, PA, doi:10.1520/D1557-09