TY - RPRT TI - The geochemistry of environmentally important trace elements in UK coals, with special reference to the Parkgate coal in the Yorkshire–Nottinghamshire Coalfield, UK AU - D.A. Spears AU - S.J. Tewalt PY - 2009 DO - 10.1016/j.coal.2009.08.010 UR - https://pubs.usgs.gov/publication/70263569 ID - 70263569 ER -