00703cam a2200181 a 450000500170000000800410001703500110005804000240006908200220009310000210011524500870013626000920022330000340031550400260034965000320037565000400040771000740044720181209224159.0880914s1986 coua bs 000 0 eng d a146209 aANLbengcBD-DhBPA 04a310219bAGS 19861 aAggarwal, y. p. 10aStatistical methods commonly used in water quality data analysis /cY. P. Aggarwal aFort Collins, Colo. :bWatershed Systems Development Group, USDA Forest Service,c1985. a376, [9] p. :bill. ;c28 cm. aBibliography: p. 136. 0aWater qualityxMeasurement. 0aWater qualityxStatistical methods.1 aUnited States.bForest Service.bWatershed Systems Development Group.