1. Aluminium from indigenous U.K. resources - A review of possibilities;Christie;Warren Spring Laboratory, Rept. No. LR 219 (ME),1976
2. Review of methods available for extraction and production of smelter grade alumina from U.K. indigenous resources;Philips;Inst. Min. Metall., Trans. C,1979
3. Acid extraction processes for non-bauxite alumina minerals;Hamer;CANMET Rept. No. 77-54,1977
4. Alumina process feasibility study and preliminary pilot plant design -Task 1;Bengtson;Final Report, U.S. Bur. Mines, OFR-18-78,1978
5. Alumina process feasibility study and preliminary pilot plant design -Task 2;Bengtson;Final Report, U.S. Bur. Mines, OFR-49-78,1978