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.
Չիկագոյի ոճի (17րդ խմբ.) մեջբերումAWWA 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.
MLA (8րդ խմբ.) ՄեջբերումAWWA 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.