Geophysical studies to detect the Acme Underground Coal Mine, Wyoming /
Miller, C. H.(Carter H.)
[Washington] : Government Printing Office,
1988.
"Magnetic, electromagnetic, gravimetric, seismic refraction, and precise topographic surveys gave only subtle hints of underground openings, suggestion the need for further research in geophysical techniques."
Acme Underground Coal Mine (Wyo.)
Geophysics