00251nam a22001097a 4500015000800000041000800008080000900016100002400025100002400049245002500073260004300098  a594  aENG  a500	  cHolmes, Leake, Shaw  aHolmes, Leake, Shaw  aGateways to science.  aMc Graw Hill Book.bMc Graw Hill Book.