Eckenfelder, W. Wesley (William Wesley), 1926-, Bowers, Alan R., Roth, John A., International Symposium on Chemical Oxidation : Technology for the Nineties (5th : 1995 : Nashville, Tennessee)

IAWQ International Specialized Conference on Pretreatment of Industrial Wastewaters (1993 : Athens, Greece), Andreadakis, A. D., Christoulas, D. G.

Eckenfelder, W. Wesley (William Wesley), 1926-, Bowers, Alan R., Roth, John A., International Symposium on Chemical Oxidation : Technology for the Nineties (4th : 1994 : Nashville, Tennessee)

Short Course on Industrial Wastewater Treatment (1994 : Kuala Lumpur), Universiti Teknologi Malaysia. Fakulti Kejuruteraan Awam. Jabatan Alam Sekitar

Short Course on Seepage and Stability Analysis of Slopes for Design and Construction Practice (1993 : Singapore), Fredlund, D. G., Harianto Rahardjo, Nanyang Technological University. Centre for Continuing Education

Eckenfelder, W. Wesley (William Wesley), 1926-, Bowers, Alan R., Roth, John A., International Symposium on Chemical Oxidation : Technology for the Nineties (3rd : 1993 : Nashville, Tennessee)

Tedder, D. W. (Daniel William), 1946-, Pohland, Frederick G., 1931-, American Chemical Society. Division of Industrial and Engineering Chemistry

Chua, Thia-Eng, Garces, Len R., Conference on Waste Management in the Coastal Areas of the ASEAN Region (1991 : Singapore)

United States. Environmental Protection Agency

Water Environment Federation Annual Conference (65th : 1992 : New Orleans, Louisiana)

Eckenfelder, W. Wesley (William Wesley), 1926-, Bowers, Alan R., Roth, John A., International Symposium on Chemical Oxidation : Technology for the Nineties (2nd : 1992 : Nashville, Tennessee)

Malikides, E, International Specialised Conference on Industrial Wastewater Treatment and Disposal (1990 : Nicosia, Cyprus)