000 00281 a2200121 4500
020 _a9788121905992
084 _2Colon Classification
100 _aMATHUR, D S
245 _aMechanics
260 _bS Chand & Company Pvt Ltd
_c2021
_aNew Delhi
300 _a834p.
942 _cGEN
999 _c625260
_d625260