Proceedings :
water quality for the new decade, annual conference, Philadelphia, Pennsylvania, June 23-27, 1991 /
sponsored by American Water Works Association.
APA Citation
American Water Works Association. (1991). Proceedings: water quality for the new decade, annual conference, Philadelphia, Pennsylvania, June 23-27, 1991. Denver, CO: AWWA.
MLA Citation
American Water Works Association. Proceedings: Water Quality for the New Decade, Annual Conference, Philadelphia, Pennsylvania, June 23-27, 1991. Denver, CO: AWWA, 1991.
Warning: These citations may not always be complete (especially for serials).