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Welcome to eGyanKosh, your ultimate resource for academic excellence! In this section, we present Unit-4 of our comprehensive study material on cataloguing documents using AACR-2R, tailored specifically for IGNOU students in 2025. This invaluable resource offers a thorough understanding of the principles and practices of cataloguing, ensuring you are well-equipped to navigate the complexities of library and information science. Dive into the free downloadable materials designed to enhance your learning experience, boost your knowledge, and prepare you for success in your studies. Explore the intricacies of AACR-2R and elevate your cataloguing skills right here!