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Harder, L. F.; Seed, H. B.
Determination of Penetration Resistance for Coarse-Grained Soils Using the Becker Hammer Drill.
National Science Foundation, Washington, DC., May 1986, 148 p.
Identifying Number(s): UCB/EERC-86/06
Keywords: ; Measuring instruments; Soils; Gravel; Standards; Resistance; Earthquakes; Data processing; Drilling machines (Tools); Sand; Tests; Penetration