TY - RPRT TI - Cytochrome P4501A biomarker indication of oil exposure in harlequin ducks up to 20 years after the Exxon Valdez oil spill AU - Daniel Esler AU - Kimberly A. Trust AU - Brenda E. Ballachey AU - Samuel A. Iverson AU - Tyler L. Lewis AU - Daniel Rizzolo AU - Daniel M. Mulcahy AU - A. Keith Miles AU - Bruce R. Woodin AU - John J. Stegeman AU - John D. Henderson AU - Barry W. Wilson PY - 2010 DO - 10.1002/etc.129 UR - https://pubs.usgs.gov/publication/70138867 ID - 70138867 ER -