"Science." . . "Juvenile works"@en . "The author gives a brief history of our knowledge and beliefs about volcanoes. He discusses the features of a volcano, the causes of eruptions and the locations of active volcanoes on earth and elsewhere in our solar system." . . . "Atashfashan'ha" . . "Discusses the features of a volcano, the causes of eruptions, and the locations of active volcanoes on earth and elsewhere in our solar system."@en . "Discusses the features of a volcano, the causes of eruptions, and the locations of active volcanoes on earth and elsewhere in our solar system." . . . . . "How did we find out about volcanoes?"@en . "How did we find out about volcanoes?" . . . . . . "Juvenile works" . . .