IS:Code of Practice for Installation of Septic Tanks:Design Criteria and Construction(Part 1)
Bureau Of Indian Standards
IS:Code of Practice for Installation of Septic Tanks:Design Criteria and Construction(Part 1) - 1 - Bureau Of Indian Standards, New Delhi 1986
IS:Code of Practice for Installation of Septic Tanks:Design Criteria and Construction(Part 1) - 1 - Bureau Of Indian Standards, New Delhi 1986