Online Books by
George N. Aul
Books from the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Aul, George N.: Degasification study from an air shaft in the Beckley Coalbed (United States Dept. of the Interior, Bureau of Mines, 1982), also by Tobias W. Goodman and Joseph Cervik (page images at HathiTrust)- Aul, George N.: Grouting horizontal drainage holes in coalbeds (Dept. of the Interior, Bureau of Mines, 1979), also by Joseph Cervik (page images at HathiTrust)
- Aul, George N.: Methane drainage study in the Sunnyside coalbed, Utah (Dept. of the Interior, Bureau of Mines, 1978), also by J. H. Perry and Joseph Cervik (page images at HathiTrust)
- Aul, George N.: Rotary drilling holes in coalbeds for degasification (U.S. Bureau of Mines, 1975), also by Joseph Cervik, H. H. Fields, and United States Bureau of Mines (page images at HathiTrust)
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