00490nam a2200181u  450000500170000000700030001700800410002002000180006110000270007924500320010626000430013830000210018144000180020250000090022065000220022965000170025165000400026820190501181352.0ta060105|||||||||||||||||||||||||||||eng|u  a0-7172-7572-81 aKnapp, Brian, BSc, PhD10aIron chromium and manganese0 aDanbury, CTbGrolier Educationalc1996  a56 p. incl index  aElementsvV.4  acard 4aChemical elements 4aPeriodic law 4aChemistry, Physical and theoretical