00640nam a2200181Ia 4500003000900000008004100009040001600050080002200066110003100088245018700119250001200306260004800318300000800366650002700374650002000401650001800421650001900439IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a69.01:624bIND-20  aBureau of Indian Standards 0aIndian standard: method of measurement of building and civil engineering worksbpt. 20, laying of gas and oil pipe linescBureau of Indian Standards                                    a3rd ed.  aNew DelhibBureau of Indian Standardsc1993  a6p.  acivil engineering work  aIndian standard  aLaying of gas  aOil pipe lines