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Synopsis The last few decades have witnessed an unprecedented growth in the quality of information on all aspect of life. As a result, libraries have experienced drastic changes in respect of their holdings, management techniques and retrieval of information. The invention of computer and the advent of Internet complicated the process of locating desired information due to the vastness of resources. The ultimate aim of a library is to serve its users and to give them maximum satisfaction out of minimum resources. Reference service stands to find answers to their queries and even direct them outside a library for a proper source of information in case the answer is not available within their reach. This book will be useful for the students of library and information science, working librarians and information professionals, researchers and all other persons who are interested in retrieval of information available in the print media or on the World Wide Web.