Indian Standards Institution. (1970). Indian Standard: Specification for Rubber Sealing Rings for Gas Mains, Water Mains and Sewers. Indian Standards Institution.
Styl ChicagoIndian Standards Institution. Indian Standard: Specification for Rubber Sealing Rings for Gas Mains, Water Mains and Sewers. N.Delhi: Indian Standards Institution, 1970.
Citace podle MLAIndian Standards Institution. Indian Standard: Specification for Rubber Sealing Rings for Gas Mains, Water Mains and Sewers. Indian Standards Institution, 1970.
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