AWWA Seminar on Recent Advances in Sludge Treatment and Disposal Washington, D.C., & American Water Works Association. Research Division. (1985). Proceedings: AWWA Seminar on Recent Advances in Sludge Treatment and Disposal : annual conference, Washington, D.C., June 23, 1985. American Water Works Association.
Dyfyniad Arddull ChicagoAWWA Seminar on Recent Advances in Sludge Treatment and Disposal Washington, D.C., and American Water Works Association. Research Division. Proceedings: AWWA Seminar on Recent Advances in Sludge Treatment and Disposal : Annual Conference, Washington, D.C., June 23, 1985. Denver, Colo.: American Water Works Association, 1985.
Dyfyniad MLAAWWA Seminar on Recent Advances in Sludge Treatment and Disposal Washington, D.C., and American Water Works Association. Research Division. Proceedings: AWWA Seminar on Recent Advances in Sludge Treatment and Disposal : Annual Conference, Washington, D.C., June 23, 1985. American Water Works Association, 1985.