Klein, Terry L. Mineral resource assessment of the U.S. portion of the International Falls 1° x 2° Quadrangle, Northern Minnesota - Washington, D.C. U.S. Geological Survey 1997 - 54 p. ilus., maps., tbls. - U.S. Geological Survey Bulletin n.2044 . Subjects--Topical Terms: RECURSOS MINERALESYACIMIENTOS MINERALES Subjects--Geographic Terms: ESTADOS UNIDOSMINNESOTA