Rücks. der HTS: "This book presented herewith is a reprint of educational material taken from existing textbook matter now in use in American schools and colleges. It is published for use as an aid in instruction in certain educational activities of the armed forces." - Literaturangaben
Interaktive Lehrer- und Schülerressourcen auf myNGconnect.com (GeoVideo, National Geographic photo gallery, maps and graphs, interactive Whiteboard GeoActivities)