Proceedings of post-conference colloquium on Foam and scum in biological wastewater treatment : 5th September 2003, Prague / [organizers Department of Water Technology and Environmental Engineering of Prague Institute of Chemical Technology ... et al. ; edited by Olga Krhůtková].    Praha : Prague Institute of Chemical Technology, Department of Water Technology and Environmental Engineering, 2003 . 103 s. il. ; . ISBN 80-239-1134-1