共 13 条
[1]
BERKOWITZ N, 1979, INTRO COAL TECHNOLOG, P45
[5]
FEELEY TJ, 1986, FOSSIL FUELS UTILIZA, P1
[6]
Goldschmidt V. M., 1954, GEOCHEMISTRY-GERMANY
[7]
NORTON GA, 1986, FOSSIL FUELS UTILIZA, P63
[8]
RUCH RR, 1974, ILLINOIS STATE GEOLO, V72
[9]
Steele JD., 1983, MINERAL MATTER TRACE
[10]
WELCOMER TD, 1982, THESIS IOWA STATE U