TY - RPRT TI - Maintenance and modifications to structural systems AU - Fanella, David A AU - Derecho, Amaldo T AU - Ghosh, S K PY - 2005 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST NCSTAR 1-1cv1 DO - 10.6028/NIST.NCSTAR.1-1cv1 ER -