. . . . "Appearance, habits of species of wildlife threatened with extinction, and the steps which are being taken to protect them. Grades 4-6."@en . . . . "Wildlife in danger. With introd. by Robert Porter Allen"@en . "Juvenile works"@en . . . . . . . . . "Wildlife in Danger, etc. [With illustrations.]"@en . . . "Wildlife in danger"@en . . . . . .