TY  - BOOK
AU  - Chironis,N.P.
TI  - Coal Age Operating Handbook of Underground Mining
SN  - 07-011457-9
PY  - 1977///
CY  - New York
PB  - McGraw-Hill, Inc.
KW  - Mining Engineering
N1  - Includes Index; vol. 1 ( 1977, 410 p.); vol. 2 ( 1978, 442 p.)
ER  -