000			00292 a2200133 4500
080			_a621 _bB 627 M
245	1		_aMachine design _cby P.H. Black
250			_a2nd edn.
260			_aNew York _c1955
650			_aMachine Design
100	1		_aBlack, P.H. _d
300			_a471 p.
901			_a47723
999			_c39619 _d39619