1. Robert A. Taft Water Research Center: Report TWRC-(series). 5. Ammonia removal from agricultural runoff and secondary effluents by selected ion exchange [with list of references] Mar. 1969. Bookmark Corporate/Agency Authors: Federal Water Pollution Control Administration and Intenrior Dept. Publisher: Federal Water Pollution Control Administration Date: [March 1970] SuDoc number: I 67.19:(nos.)