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- 85600120 contributor B5081659.
- 85600120 created "1985.".
- 85600120 date "1985".
- 85600120 date "1985.".
- 85600120 dateCopyrighted "1985.".
- 85600120 description "Bibliography: p. 13.".
- 85600120 extent "18 p. :".
- 85600120 isPartOf "Report of investigations (United States. Bureau of Mines) ; 8983.".
- 85600120 isPartOf "Report of investigations / United States Department of the Interior, Bureau of Mines ; 8983".
- 85600120 issued "1985".
- 85600120 issued "1985.".
- 85600120 language "eng".
- 85600120 publisher "[Pittsburgh, Pa.] : U.S. Dept. of the Interior, Bureau of Mines,".
- 85600120 subject "622 s 622/.23 19".
- 85600120 subject "Bits (Drilling and boring) Testing.".
- 85600120 subject "Coal mining machinery Testing.".
- 85600120 subject "TN23 .U43 no. 8983 TN279".
- 85600120 title "Conical bit rotation as a function of selected cutting parameters / by Carl F. Wingquist ... [et al.].".
- 85600120 type "text".