. . . . . . . . . . . . "Aggregate tests for Portland cement concrete pavements : review and recommendations"@en . . . . "\"This digest summarizes the findings from NCHRP Project 4-20C, 'Aggregate Tests Related to Performance of Portland cement concrete Pavements: State of the Knowledge.' It was prepared by Dr. Amir N. Hanna ... from the contractor's final report authored by Dr. Kevin J. Folliard and Mr. Kurt D. Smith ...\"--Page [1]."@en . . . "Aggregate tests for Portland cement concrete pavements review and recommendations"@en .