TY  - BOOK
AU  - INDIAN STANDARDS INSTITUTION
TI  - IS: 1239 (Part I) - 1973 (with amendment No.3 - 1978) : Specification for Mild Steel Tubes, Tubulars and Other Wrought Steel Fittings Part 1 Mild Steel Tubes
PY  - 1974///
CY  - New Delhi
PB  - BIS
ER  -