TY - RPRT TI - Review and refinement of ATC 3-06 tentative seismic provisions : report of Technical Committee 6 : steel AU - Lew, H S PY - 1980 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 80-2111-6 DO - 10.6028/NBS.IR.80-2111-6 ER -