00581nam a2200181Ia 4500003000900000008004100009040001600050080002100066110003300087245011800120260005000238300000900288500001900297650002300316650001800339650002100357650002100378IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a083.7:628.1bISI  aIndian Standards Institution 0aIndian standard code of basic requirements for water supply drainage and sanitationcIndian Standards Institution  aNew DelhibIndian Standards Institutionc1971  a18p.  aIS 1172 : 1971  a Sewage-Standards  a Standards   a Water Supply   aNASA Thesaurus