000 00269nam a2200109Ia 4500
008 230401s9999 xx 000 0 eng d
100 _akhurmi(r.s) & gupta
245 0 _aatb of refrigeration & air conditioning
250 _aIV
260 _bS. CHAND
942 _2ddc
_cBTECH
999 _c5242
_d5242