000 00278nam a2200121Ia 4500
008 220201s1970 xx 000 0 eng d
082 _a658
100 _aRC Singh
245 0 _aEconomics of enigneering works
260 _bAtma ram & sons
_c1970
300 _a181
942 _2ddc
999 _c76648
_d76648