共 67 条
- [61] VANZOONEN D, 1963, J I PET, V49, P385
- [62] WEIL CS, 1960, ARCH ENV HLTH, V1
- [63] WOLK RH, 1975, AM CHEM SOC DIV FUEL, V20, P116
- [64] ZAWADZKI R, UNPUBLISHED
- [65] 1979, REFINING COAL SHALE
- [66] 1978, WORLD ENERGY OUT APR
- [67] 1970, Patent No. 3523073