General & OtherSuggested hoisting-signal code for slope coal mines and for shaft mines having only one levelD. Harrington![Suggested hoisting-signal code for slope coal mines and for shaft mines having only one level]()
Suggested hoisting-signal code for slope coal mines and for shaft mines having only one level
D. Harrington
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“Suggested hoisting-signal code for slope coal mines and for shaft mines having only one level” by D. Harrington: a public-domain book in “General & Other”…
Catalogue details
- Author
- D. Harrington
- Category
- General & Other
- Language
- English
- Source
- HathiTrust