Prototype borehole miner selectively extracts gold from permafrost.

Bibliographic Details
Corporate Author:	National Institute for Occupational Safety and Health
Format:	Government Document Book
Language:	English
Published:	[Washington, DC] : U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, [1997]
Series:	Technology news ; no. 460.
Subjects:	Placer mining > United States.
Online Access:	https://purl.fdlp.gov/GPO/LPS91786

Available Online