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Megascopic Description of Coal Drill Cores

D. ChunJS. GoscinskiJW. Robinson

出版	ASTM International, 1978
URL	http://books.google.com.hk/books?id=EMt5zgEACAAJ&hl=&source=gbs_api

註釋

The U.S. Steel Research Laboratory employs a system of logging and describing coal drill-core samples which provides a permanent record of the lithologic variations in a coal bed. This paper outlines the procedure used for the megascopic description of coal drill-core sample.