Indian standards institution . ISI. (1987). Specification for high density polyethylene pipes for portable water supplies sewage and industrial effluents IS: 4984-1987. Indian standards institution.
Chicago Edition CitationIndian standards institution . ISI. Specification for High Density Polyethylene Pipes for Portable Water Supplies Sewage and Industrial Effluents IS: 4984-1987. New Delhi: Indian standards institution, 1987.
MLA Edition CitationIndian standards institution . ISI. Specification for High Density Polyethylene Pipes for Portable Water Supplies Sewage and Industrial Effluents IS: 4984-1987. Indian standards institution, 1987.