Magnetic roasting and leaching for upgrading Minnesota manganiferous iron ores - Jacobs, H. D. (Howard D.); United States. Bureau of Mines ([Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, 1970)
"July 1970"--Cover.
Includes bibliographical references.
Mode of access: Internet.
Keywords: Ore-dressing.; Iron ores -- Minnesota