Tunza is a UNEP magazine for and by young people. This issue is devoted to climate change and the International Polar Year.

Report describing the status of the SM-1, SM-1A, and PM-2A reactors, specifically regarding the effects "of irradiation on nil-ductility transition temperature and the associated problem of brittle fracture." (p. iii)

From: Mitchell's general atlas. Map shows major cities of the North American continent and the Russian America, Danish America, British America, and Central American boundaries dividing it during the mid-nineteenth century. Relief shown by hachures. Scale [ca. 1:28,000,000].

Three travel maps which are meant to accompany a text about expeditions in the area. The first map shows the north pole and northernmost parts of North America and Greenland; some exploration routes and geographic features are noted. The second map shows exploration and discoveries in the Arctic Sea area with regions and some geographic features noted. The third map is a nautical chart of the Port of Lievely with depths marked in fathoms and some relief of surrounding land marked.

Map shows physical features, settlements, areas of Native American habitation, and political divisions in eastern, southern, and Pacific coast of North America and much of South America; little information for northwestern portion of North America, the central interior of South America, and interior Alaska. Insets: "Karte von der republik der Vereingten Dreyzehen Staaten in Nord Amerika," [Map of the upper northwest portion of North America], and [Map of the North Atlantic Ocean and vicinity from Hudson's Bay to Greenland]. Includes notes on explorers and dates of discoveries. Relief shown pictorially. Scale [ca. 1:19,500,000].