عنوان پایان نامه: سيليس زدايي از کانسارهاي بوکسيت دار
Alcoa Inc.,2002b,Alcoa World Alumina and Chemicals and the Government of Jamaica to invest $115 million to expand Jamalco alumina re . nery Operations : Clarendon , Jamaica ,Alcoa Inc .press release ,April 27,1 p. - Aluminum . Ch .in Mineral Commodity Summaries,annual. - Aluminum . Mineral Industry Surveys , monthly . - Aluminum and bauxite . ................
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