TY  - BOOK
AU  - Y.A. Liu
AU  - 
TI  - Physical Cleaning Coal: Present and Developing Methoda
U1  - 622.33 
PY  - 1982///
CY  - New York
PB  - Marcel Dekker
KW  - Physical Cleaning Coal: Present and Developing Methoda
N1  -  Ref. at the end of each chap
ER  -