TY - GEN AU - Allison L Huang AU - Robert E Chapman AU - David T Butry C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2009-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.SP.1101 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2009 TI - Metrics and tools for measuring construction productivity ::technical and empirical considerations ER -