TY - RPRT TI - Biodegradation and attenuation of steroidal hormones and alkylphenols by stream biofilms and sediments AU - Jeffrey Writer AU - Larry B. Barber AU - Joseph N. Ryan AU - Paul M. Bradley PY - 2011 DO - 10.1021/es2000134 UR - https://pubs.usgs.gov/publication/70171002 ID - 70171002 ER -