Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitlePROFESSIONAL SERVICES.PublicationJournal of the American Water Resources Association, 1979, Vol 15, Issue 6, p1829ISSN1093-474XPublication typeArticleDOI10.1111/j.1752-1688.1979.tb01218.x