Dealtime (dříve Evenbetter) - A virtual bookshop where one can search as according an author and a title as according the ISBN. Prices of various bookshops can be compared depending on how quickness is the book delivery. http://www.dealtime.com
Amazon - A virtual bookshop with a sophisticated system of books description and registers of additional recommended literature concerning the selected publication. One of the biggest bookshops worldwide. http://www.amazon.com
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