TY  - BOOK
AU  - Hartman 
TI  - Introductory mining engineering 
SN  - 0471820040 
U1  - 622 HAR 1987 
PY  - 1987///
CY  - New York
PB  - John Wiley & Sons
KW  - Mining engineering
N1  - "A Wiley-Interscience publication."; Includes bibliographical references and index
ER  -