Discuss the categorisation of information sources as given by different experts.

Information sources play a crucial role in the field of information science and services, serving as the foundation for knowledge dissemination, research, and decision-making. Various experts in the field have proposed categorizations of information sources to help organize and understand the diverse range of materials available. These categorizations provide frameworks that facilitate effective information retrieval and utilization. Here, we will explore the categorizations of information sources as outlined by different experts in the field.

1. Ranganathan's Five Laws of Library Science:
   S.R. Ranganathan, a pioneering figure in library science, proposed the Five Laws of Library Science, which include laws related to the types of information sources. His first law, "Books are for use," emphasizes the primary role of books as information sources. Ranganathan classified information sources into two main categories: "Books" _________ ________ __________ _______ _____.
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