Comparison of aerial and ground surveying of subsidence over an active longwall
By: by John C. LaScola.
Series: Report of investigations (United States. Bureau of Mines) -- 9214.
Publisher: Dept. of the Interior
Published: 1988
Place of publication: Washington, DC
Language: eng
Number of pages: 12
Subjects: Mine subsidences -- Pennsylvania -- Waynesburg Region -- Measurement; Longwall mining -- Pennsylvania -- Waynesburg Region -- Safety measures
Notes:  88600281 // t_oclc

Bibliogr.

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