TY - RPRT TI - Characteristic constants of 2,2',4'-trihydroxyazobenzene-5-sulfonic acid, a reagent for spectrophotometric analysis AU - Mary H. Fletcher PY - 2002 DO - 10.1021/ac50153a036 UR - https://pubs.usgs.gov/publication/70010847 ID - 70010847 ER -