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2. The National Geotechnical Experimentation Sites at the Texas A and M University: Clay and Sand a Summary in NGES;Briaud,2000
3. Scale effects in cone penetration tests;de Lima,1991
4. National Geotechnical Experimentation Sites;DiMillio;Public Roads, FHWA, U.S. DOT,1993
5. Calibration chamber studies of Piezocone tests in cohesive soils, ASCE;Kurup;J. of Geotech. Engrg. Div.,1994