TY - RPRT TI - Embryotoxic thresholds of mercury: Estimates from individual mallard eggs AU - G. H. Heinz AU - D. J. Hoffman PY - 2003 DO - 10.1007/s00244-002-2021-6 UR - https://pubs.usgs.gov/publication/5224221 ID - 5224221 ER -