Indian Standard:Methods of Measurement of Building & Civil Engineering Works:Laying of Gas & Oil Pipe Lines(Part 20)
Indian Standards Institution
Indian Standard:Methods of Measurement of Building & Civil Engineering Works:Laying of Gas & Oil Pipe Lines(Part 20) - 1 - Indian Standards Institution, New Delhi 1981
Indian Standard:Methods of Measurement of Building & Civil Engineering Works:Laying of Gas & Oil Pipe Lines(Part 20) - 1 - Indian Standards Institution, New Delhi 1981