Question

What is literary sources
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Answer 1

Answer:

Source literature is a kind of information source. It might, for example, be cited and used as sources in academic writings, and then called the literature on the subject. The meaning of "source literature" is relative. From the point of view of a bibliographic index the indexed papers are "source literature". 

Answer 2

Answer:

this sources are used to get some information to make complete the work of literature