1. The Thomson refinery;Spence;Trans. Can. Inst. Min. Metall.,1964
2. Extraction of lead by direct electrolysis of PbS;Ito;Nippon Kogyo Kaishi,1961
3. Dissolution of lead from an anode composed of lead sulfide concentrate and graphite;Sawamoto;Denki Kagaku,1965
4. Anodic dissolution of lead sulfide and cupric sulfide;Oki;Mem. Fac. Eng. Nagoya Univ.,1970
5. Electrowinning of lead directly from galena;Skewes,1972