TY - RPRT TI - Effects of formaldehyde on nitrification in biofilters of small‐scale recirculating systems AU - Kim T. Fredricks AU - Aaron R. Cupp AU - Susan M. Schleis AU - Richard A. Erickson AU - Mark P. Gaikowski PY - 2018 DO - 10.1111/are.13785 UR - https://pubs.usgs.gov/publication/70199259 ID - 70199259 ER -