000			00474nam a2200193Ia 4500
005			20231024103353.0
008			180710s9999 xx 000 0 und d
020			_a83779
041			_aEN
082			_a629.83 _bPOR _223
100			_aPorter, A
245			_aIntroduction to servo-mechanisms _c/by A.Porter
260			_aLondon _bMethuen _c1950
300			_avi, 154 p.
500			_aIncludes index.
509			_aNS
650		0	_9150543 _aServo Mechanisms
942			_cS
999			_c68022 _d68022