Search U.S. government technical reports digitized or harvested by TRAIL.
Review of the ammonia industry and its application to North Dakota
Core-drill sampling of Cuyuna-range manganiferous iron formations, Crow Wing County, Minn.
Lake Superior iron resources :metallurgical evaluation and classification of nonmagnetic taconite drill cores from the west central Mesabi Range
Open-pit iron mining, milling, and costs, Groveland Mine, the Hanna Mining Co., Dickinson County, Mich.
Lake Superior iron resources :preliminary sampling and metallurgical evaluation of central Mesabi nonmagnetic taconites
Lake Superior iron resources :preliminary samples and metallurgical evaluation of selected Michigan-Wisconsin iron formations
Lake Superior iron resources :reexamination of nonmagnetic taconite occurrences in the Hibbing, Minn., area by flotation, magnetic separation, and petrographic methods