Donald H Avery No description specified. 1-4 (4 Records) Documents Complex iron smelting and prehistoric culture in Tanzania (1978) A metallurgical study of the iron bloomery, particularly as practiced in Buhaya (1979) Preheating: Practice or Illusion? (1996) Use of Preheated Air in Ancient and Recent African Iron smelting Furnaces: A Reply to Rehder (1996)