TY - BOOK ED - United States. TI - Aggregate gradation for highways: Aggregate gradation, simplification, standardization and uniform application; and, A new graphical chart for evaluating aggregate gradation U1 - 625.7 PY - 1962/// CY - Washington PB - U.S. Govt. Print Off. KW - Aggregates (Building materials) KW - Standards KW - Road materials KW - MCE ER -