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Study of mine roof of Pittsburgh coal bed in Pittsburgh mining district
| Location | Call # | Status |
|---|---|---|
| Joyner - Microforms B300 | C22.5-541 | ✔ Available |
Annual engineering exhibition at Cardiff, Wales
| Location | Call # | Status |
|---|---|---|
| Joyner - Microforms B300 | C18.138-807 | ✔ Available |
Pillar stability in large underground openings
| Location | Call # | Status |
|---|---|---|
| Joyner - General Stacks | TN210 .C68 VOL. 81 NO. 3 | ✔ Available |