00297    a2200109   4500020001500000082001600015100002400031245004600055260004400101300001600145650002600161  a0749260076  a620.11bOPE  aThe open university  aLiving with technology block 4bMaterials  aKeynesbThe Open Universityc1989g1991  a30p.c30cm.  aENGINEERING MATERIALS