00306nam a2200133Ia 4500100004000000650001200040490000600052654002100058245002000079260004500099082000800144300000800152546001200160  aUniversal encyclopedia of machines   aGeneral  v1  aHow  things work  aHow things work  bGranada publicationaGreat Britainc1975  a621  a590  aENGLISH