Slope mining (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Slope mining" in English language version.

refsWebsite

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1books.google.com

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archive.org

International Correspondence Schools (1900). A treatise on coal mining. The Colliery engineer co. p. 33.

books.google.com

James G. Speight (1994). The Chemistry Tech of Coal 2e. Marcel Dekker. p. 105. ISBN 978-0-8247-9200-8.