000			003290000a22001210004500
245			_aGears : spur, helical, bevel, internal, epicyclic and worm
100			_aHoughton, P.S.
260			_aLondon _bTechnical Press _c1970
300			_avarious pages. : ill., photos.
080			_a621.833 _bH6
041			_aEN
942			_cBK _04
999			_c95090 _d95090