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In the atlas of data Steinkugel Erde its about the earth as a stoniness ball, about her geological, physical and chemical composition of fluid and harsh rock and about the history. With the aid of cartography and visualization statistical files and facts is complex information about the three maingroups of all rockssorts of the earth and their 140 minerals summarized and easily understandable in an atlas documented.
Reference work funktion: In the leporello-folded book are all the pages aimed connected with each other so that everyone can trace in the seconds part of the atlas all of the rockssorts within the register with minerals.