Gottschalk, C., Libra, J. A., & Saupe, A. Ozonation of water and waste water: A practical guide to understanding ozone and its applications (2nd, completely revised and updated ed.).

Gottschalk, C., J. A. Libra, and A. Saupe. Ozonation of Water and Waste Water: A Practical Guide to Understanding Ozone and Its Applications. 2nd, completely revised and updated ed.

Gottschalk, C., et al. Ozonation of Water and Waste Water: A Practical Guide to Understanding Ozone and Its Applications. 2nd, completely revised and updated ed.