. . . . . . "Recovery of potash as by-product in blast-furnace industry"@en . . . . . . . . . . "The recovery of potash as a by-product in the blast-furnace industry"@en . "The recovery of potash as a by-product in the blast-furnace industry" . . . . . . . . . . "The recovery of potash as a by-product in the blast furnace industry"@en . . . . "Vereinigte Staaten. Department of Agriculture." . .