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  Advanced Euclidean Geometry - Roger A. Johnson - Google Books

  https://books.google.de/books?id=559e2AVvrvYC&pg=PA195

  For many years, this elementary treatise on advanced Euclidean geometry has been the standard textbook in this area of classical mathematics; no other book has covered the subject quite as well. It explores the geometry of the triangle and the circle,…

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  Earth Surface Processes - Philip A. Allen - Google Books

  http://books.google.de/books?id=e5i8cRGRCuwC&pg=PA5

  Earth Surface Processes is an introductory text for those studying the dynamics of fluid and sediment transport in the environments, in the context of both present-day patterns as well as the environmental changes decipherable in the geological record. The…

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