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02a0031425;¥112.76;20011205d1997 ekmy0engy01;eng;a z 000yy;r;High-resolution surface-seismic imaging techniques for NEHRP soil profile classifications and earthquake hazard assessments in urban areas;Robert A. Williams ... et al;[Denver, CO];U.S. Geological Survey;1997;i, 42 p.;ill;Open File Report;U.S. Geological Survey;97-501;适用于城市地区全国地震减灾计划土壤剖面分类和地震灾害评价的高分辩率地表地震成象技术;Earthquake hazard ; Imaging technique;High resolution ; Urban areas ; Soil profile ; High resolution ; Urban areas ; Soil profile;a263.7;Williams;Robert A.;101;EB00060115;263.7;W67;r¥112.76;a07;b1