TY  - BOOK
AU  - Crickmer,Douglas F.
AU  - Zegeer,David A.
ED  - Society of Mining Engineers of AIME.
TI  - Elements of practical coal mining
SN  - 0895202700
PY  - 1981///
CY  - New York
PB  - Society of Mining Engineers of the American Institute of Mining, Metallurgical, and Petroleum Engineers
KW  - Coal mines and mining
N1  - "Coal Division of SME-AIME [and] Howard N. Eavenson AwardFund of AIME, co-sponsors."
ER  -