Research and development activities
Subtitle: fiscal year 1970
By: by Staff, Safety Research Center.
Series: Information circular (United States. Bureau of Mines) -- 8539.
Publisher: United States Department of the Interior, Bureau of Mines
Published: 1972
Place of publication: Washington, DC
Language: eng
Number of pages: 38
Subjects: Mine safety -- Research.
Notes: Pittsburgh Mining and Safety Research Center Report No. 8539.

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