TY  - BOOK
AU  - VOROBJEV Boris R
AU  -  DESHMUKH Ramrao T
TI  - Advanced coal mining:  For mining students, mining engineers and colliery managers   
U1  - X9(HZ551).2.N6, K6.1-K6.2 
PY  - 1966///
CY  - Dhanbad
PB  - Kusum Deshmukh         
N1  - Bibliography chapterwise; Appendix: P 515-20
ER  -