1. Ramdohr, P.: The Ore Minerals and their Intergrowths, Oxford: Pergamon (1969)
2. Ingamells, C.O.: Talanta 21, 141 (1974) and Talanta 23, 263 (1976)
3. Japanese Industrial Standard JIS M8100 General Rules for Methods of Sampling of Bulk Materials, 1972
4. Sampling in the Mineral and Metallurgical Processing Industries. Spec. Publ. Inst. Min. Metall. 1974
5. Unpublished Work and Standard Methods — Capper Pass, Ltd.