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- Diamond drilling blast holes, Bell Mine, the Warner Co., Centre County, Pa.
- Diamond-drilling blast holes, Bellefonte Mine, National Gypsum Co., Centre County, Pa.
- Diamond-drilling blast holes, Eastern Magnetite Mine C
- Blast-hole drilling with diamond drills at the Tennessee Copper Co. mines, Ducktown, Tenn.
- Blast-hole diamond drilling in California mines