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- 84023099 contributor B4647389.
- 84023099 contributor B4647390.
- 84023099 created "1985.".
- 84023099 date "1985".
- 84023099 date "1985.".
- 84023099 dateCopyrighted "1985.".
- 84023099 description "Bibliography: p. 19.".
- 84023099 extent "ii, 31 p. :".
- 84023099 isPartOf "Report of investigations (United States. Bureau of Mines) ; 8933.".
- 84023099 isPartOf "Report of investigations ; 8933".
- 84023099 issued "1985".
- 84023099 issued "1985.".
- 84023099 language "eng".
- 84023099 publisher "[Avondale, Md.] : U.S. Dept. of the Interior, Bureau of Mines,".
- 84023099 spatial "Pennsylvania.".
- 84023099 subject "622 s 622/.42 19".
- 84023099 subject "Boring.".
- 84023099 subject "Coalbed methane drainage Pennsylvania.".
- 84023099 subject "Mine ventilation.".
- 84023099 subject "TN23 .U43 no. 8933 TN305".
- 84023099 title "Comparison of rotary and in-hole motor techniques for drilling horizontal boreholes in coal / by S.J. Kravits, A. Sainato, and G.L. Finfinger.".
- 84023099 type "text".