1. Prospects for carbon 13 nuclear magnetic resonance analysis of solid fossil-fuel materials;Bartuska;Fuel,1977
2. The reflectance of coal;Davis,1978
3. Chemical structure and properties of coal XX-Composition of the individual macerals (vitrinites, fusinites, micrinites and exinites);Dormans;Fuel,1957
4. Some relations between density and rank of coal;Dulhunty;Fuel,1951
5. Separation of coal macerals;Dyrkacz;Fuel,1982