UNIT-4 (INFORMATION SOURCES & SERVICES)

👉 (Part 1) National Information Systems and Network
👉 Abstracting and Indexing Service
👉 Alerting Service (CAS and SDI)
👉 Biographical Sources & Directories
👉 Dictionary
👉 Encyclopedia
👉 Geographical Source
👉 Information Source
👉 International Information Network (Part 1)
👉 International Information Network System (Part 2)
👉 Need and Purpose of E-Resources
👉 (Part 2) National Information Systems and Network
👉 Primary Information Source
👉 Reference Service
👉 Reference Source (Bibliographical)
👉 Secondary Information Source
👉 Tertiary Information Source
👉 Translation Service & Literature Search
👉 Year Book & Handbook