. . "Juvenile works" . "Juvenile works"@en . . . . . . "Rocks and minerals" . . "Rocks and minerals"@en . . "Pictorial works" . . . . . "Investigates the world of rocks and minerals, covering such topics as the earth's crust, the identification of minerals, and how rocks are changed by heat and pressure." . . . "Investigates the world of rocks and minerals, covering such topics as the earth's crust, the identification of minerals, and how rocks are changed by heat and pressure."@en . . . "Minéraux." . . "Roches." . .