1. Bulletin on Coal Fines Beneficiation Using Hydrocyclones and Spiral Concentrators. Mineral Deposits,1983
2. Application of spiral concentrators in fine coal processing;Apodaca,1988
3. Recent developments and application of spiral concentrators;Balderson,1982
4. Recovering fine size coal from Alabama surface mine washer using Humhreys spiral;Browning,1977
5. Selection of gravity concentration equipment;Burt,1986