TY - BOOK AU - Pressley,Thomas A. ED - United States. ED - United States. TI - Ammonia-nitrogen removal by breakpoint chlorination U1 - 628.357 PY - 1973/// CY - Washington, D.C. PB - U.S. Environmental Protection Agency KW - Nitrogen removal KW - Congresses KW - Sewage KW - Purification N1 - EPA-670/2-73-058; September 1973 ER -