TY - RPRT TI - Factors related to occurrence and distribution of selected bacterial and protozoan pathogens in Pennsylvania streams AU - Joseph W. Duris AU - Andrew G. Reif AU - Donna A. Crouse AU - Natasha M. Isaacs PY - 2013 DO - 10.1016/j.watres.2012.10.006 UR - https://pubs.usgs.gov/publication/70156931 ID - 70156931 ER -