TY - RPRT TI - Polychlorinated biphenyl congener patterns in tree swallows (Tachycineta bicolor) nesting in the Housatonic River watershed, western Massachusetts, USA, using a novel statistical approach AU - Christine M. Custer AU - L.B. Read PY - 2006 UR - https://pubs.usgs.gov/publication/1003350 ID - 1003350 ER -