00301nam a22001097a 4500008004100000020001500041082001200056100001600068245004800084260005000132300000900182110217t        xxu||||| |||| 00| 0 eng d  a0521406544  a823.914  aChilds, Rob  aTricks on the track and take a run and jump  aNew York:bCambridge University Press,c1991.  a48p.