00305nam a2200109Ia 450000500170000008000180001710000160003524500700005126000450012130000100016658300190017620260716043031.0  a08.10.03 B617  aBirch, M.A.  aCeramic tile body formulations based on raw materials from Guyana  bCommonwealth SecretariataLondonGBc1984  a41 p.  c3/7/00kM2LMGR