TY - RPRT TI - Trends in lead concentrations in major U.S. rivers and their relation to historical changes in gasoline-lead consumption AU - R. B. Alexander AU - R. A. Smith PY - 2007 DO - 10.1111/j.1752-1688.1988.tb00905.x UR - https://pubs.usgs.gov/publication/70013731 ID - 70013731 ER -