000 00244nam a2200109Ia 4500
008 220201s1980 xx 000 0 eng d
082 _a621
_bBAL-T
100 _aBALLANEY
245 0 _aTHEORY OF MACHINES
260 _bKHANNA
_c1980
942 _2ddc
999 _c30881
_d30881