TY - RPRT TI - A new tracer‐density criterion for heterogeneous porous media AU - Gilbert R. Barth AU - Tissa H. Illangasekare AU - Mary C. Hill AU - Harihar Rajaram PY - 2001 DO - 10.1029/2000wr900287 UR - https://pubs.usgs.gov/publication/70023639 ID - 70023639 ER -