@misc{1197366, author = {Allison L Huang and Robert E Chapman and David T Butry}, title = {Metrics and tools for measuring construction productivity ::technical and empirical considerations}, year = {2009}, month = {2009-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NIST.SP.1101}, language = {en}, }