An electrical method of determining the soluble salt content of soils : with some results of investigations on the effect of water and soluble salts on the electrical resistance of soils /

Mode of access: Internet.

An economic analysis of effluent standards for BOD, ammonia, total suspended solids, and disinfection : case study of a modern treatment plant /

"Project no. 80.160."

The economic impact of total dissolved solids effluent standards in Illinois /

Project no. 20.073.