"Conservation des ressources naturelles." . . "Umweltbelastung." . . "Homme Influence sur la nature." . . "Editorial Research Reports." . . . "Earth's threatened resources : timely reports to keep journalists, scholars and the public abreast of developing issues, events and trends" . . . . . . . . . . . "Earth's threatened resources : timely reports to keep journalists, scholars, and the public abreast of developing issues, events, and trends" . . . . "Earth's threatened resources timely reports to keep journalists, scholars, and the public abreast of developing issues, events, and trends"@en . . . "Earth's threatened resources"@en . . "Umweltschutz." . . . .