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- 13035099 contributor B513110.
- 13035099 created "1913.".
- 13035099 date "1913".
- 13035099 date "1913.".
- 13035099 dateCopyrighted "1913.".
- 13035099 extent "11 p.".
- 13035099 isPartOf "[U.S.] Bureau of mines. Technical paper 22".
- 13035099 issued "1913".
- 13035099 issued "1913.".
- 13035099 language "eng".
- 13035099 publisher "Washington, Govt. print. off.,".
- 13035099 subject "Electricity in mining.".
- 13035099 subject "TN1 .U6 no. 22 [2d ed.]".
- 13035099 title "Electrical symbols for mine maps, by H.H. Clark.".
- 13035099 type "text".