Description
Item Description:Prepared by GCA Corp., GCA Technology Div., under contract 210-76-0110.
Issued in cooperation with Environmental Protection Agency, Office of Energy, Minerals, and Industry, and Office of Research and Development, and Bureau of Mines, Division of Mining Research, Health, and Safety.
"December 1977."
Physical Description:viii, 69 pages : illustrations ; 28 cm.
Bibliography:Includes bibliographical references.