IS:11401-(Pt.2)-1990. Indian standard general requirements for slow sand filters. Pt.2 : design, construction, operation and maintenance.
Bureau of Indian Standards[BIS]
IS:11401-(Pt.2)-1990. Indian standard general requirements for slow sand filters. Pt.2 : design, construction, operation and maintenance. - New Delhi Bureau of Indian Standards 1990 - 5p.
ENG
IS CODE / I.S.I
IS:11401-(Pt.2)-1990. Indian standard general requirements for slow sand filters. Pt.2 : design, construction, operation and maintenance. - New Delhi Bureau of Indian Standards 1990 - 5p.
ENG
IS CODE / I.S.I