TY - RPRT TI - Estimating natural gas emissions from underground pipelines using surface concentration measurementsā˜† AU - Cho, Younki AU - Ulrich, Bridget A. AU - Zimmerle, Daniel J. AU - Smits, Kathleen M. PY - 2020 DO - 10.1016/j.envpol.2020.115514 UR - https://www.osti.gov/biblio/1664444 ID - 1664444 ER -