TY - RPRT TI - A modified procedure for mixture-model clustering of regional geochemical data AU - Karl J. Ellefsen AU - David B. Smith AU - John D. Horton PY - 2014 DO - 10.1016/j.apgeochem.2014.10.011 UR - https://pubs.usgs.gov/publication/70129677 ID - 70129677 ER -