Indian Standard: Code of Basic Requirements for water Supply, Drainage & Sanitation,IS: 1172-1993
Bureau Of Indian Standards
Indian Standard: Code of Basic Requirements for water Supply, Drainage & Sanitation,IS: 1172-1993 - 1 - Bureau Of Indian Standards, New Delhi 1993
Indian Standard: Code of Basic Requirements for water Supply, Drainage & Sanitation,IS: 1172-1993 - 1 - Bureau Of Indian Standards, New Delhi 1993