Guide to literature are categorised in which of the following type of sources of Information ?
MH SET - 2023, SET Exam - 2023,
Answer: D
Guides to literature are tertiary information sources.
Primary sources report original work, and secondary sources such as indexes and abstracts organise primary literature. Tertiary sources help the user find primary and secondary sources: guides to the literature, bibliographies of bibliographies, and directories. A guide to literature describes the sources of a subject and how to use them, so it is tertiary.
It is not a primary source, and 'periodical literature' and 'patent literature' are kinds of primary publication, so those options are wrong.
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