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Specifications for Selected Hydraulic-Powered Roof Supports: With a Methods to Estimate Support Requirement for Longwalls
| Author: | Barry, A. J. |
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| Additional Authors: | Nair, O. B. |
| Year: | 1969 |
| Document Type: | N/A |
| SUDOC: | I 28.27:8424 |
| Series: | Information circular (United States. Bureau of Mines) |
| Report Number: | I. C. 8424 |
| Link: | http://digital.library.unt.edu/ark:/67531/metadc67143/ |
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