"Argile États-Unis Mississippi, Vallée du (États-Unis)." . . "Clay." . . . . . "The Clays of the United States East of the Mississippi River"@en . . . . . . "Geology of the Globe Copper District, Arizona"@en . . . . . . . . "The clays of the United States, east of the Mississippi River" . . . . . . "The Clays of the United States east of the Mississippi River, by Heinrich Ries" . . . . "The clays of the United States east of the Mississippi River"@en . . . "The clays of the United States east of the Mississippi river" . "The clays of the United States east of the Mississippi river"@en . . . . "United States." . . "Clay United States." . .