IS:Code of Practice for Installation of Septic Tanks:Secondary Treatment and Disposal of Septic Tank Effluent(Part 2)
Bureau Of Indian Standards
IS:Code of Practice for Installation of Septic Tanks:Secondary Treatment and Disposal of Septic Tank Effluent(Part 2) - 1 - Bureau Of Indian Standards, New Delhi 1985
IS:Code of Practice for Installation of Septic Tanks:Secondary Treatment and Disposal of Septic Tank Effluent(Part 2) - 1 - Bureau Of Indian Standards, New Delhi 1985