000 00274nam a2200121Ia 4500
008 220201s1972 xx 000 0 eng d
100 _aVERMA S N
245 0 _aAUTOMATIC CONTROL SYSTEMS
250 _a2
260 _aDELHI
_bKHANNA PUB
_c1972
300 _a559
942 _2ddc
999 _c90323
_d90323