TY - RPRT TI - Impacts : NIST Building & Fire Research Laboratory AU - Raufaste, Noel J AU - Raufaste, Noel J PY - 1993 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 838-4 DO - 10.6028/NIST.SP.838-4 ER -