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Roof rock structures and related roof support problems in the Pittsburgh coalbeds of southwestern Pennsylvania
| Location | Call # | Status |
|---|---|---|
| Joyner - Fed Docs Stacks | ASK AT REFERENCE DESK | ✔ Available |
Selected mineral deposits and their role as research locations for innovative mining techniques
| Location | Call # | Status |
|---|---|---|
| Joyner - Microforms B300 | I 28.27:9445 | ✔ Available |
Chromite deposits in the state line district of Pennsylvania and Maryland
| Location | Call # | Status |
|---|---|---|
| Joyner - Microforms B300 | I 28.155:OFR 9-91 | ✔ Available |
Geologic and ground-control aspects of an experimental shortwall operation in the upper Ohio Valley
| Location | Call # | Status |
|---|---|---|
| Joyner - Fed Docs Stacks | ASK AT REFERENCE DESK | ✔ Available |