TY - GEN AU - Grill, Raymond A AU - Johnson, Duane A AU - Fanella, David A C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2005-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.NCSTAR.1-1i LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2005 TI - Post-construction modifications to fire protection, life safety, and structural systems of World Trade Center 7: ER -