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BOOK REVIEWS |
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| Abstract: | Book review in this article J. F rihagen , Electron Density Profiles in Ionosphere and Exosphere , North-Holland Publishing Company, Amsterdam, 1966, price N. fls. 60,–. J. A. E. A llum , Photogeology and Regional Mapping , Pergamon Press, London, 1966, 107 pages, 16 plates, 23 figures, price 17 s 6 d net. |
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