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Recommendations are welcome.
Any suggestions regarding either the contents or the form of the book are welcome - and expected from you. Remember that this is intended to be a book that should be able to serve as a general Internet resource and be of such a quality and scope that it can be used in higher university education anywhere. It is the author's hope that this freely available textbook will be particularly useful for students and researchers working under financial or other circumstances that make it difficult to procure a book of this kind.