The American Road & Transportation Builders Association
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AASHTO T 80-2008
AASHTO T 80-2008 history
2008AASHTO T 80-2008 Standard Method of Test for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials
0000 AASHTO T 80-2003
2002AASHTO T 80-2002 Standard Method of Test for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials HM-22; Part IIA; ASTM Designation E 18-00