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According to Walter R. Borg, “The literature in any field forms the foundation upon which all future work will be built.” Any research is based on past literature on the subject, and it is necessary to know the nuances of the research to hope for new findings.

Joph W. Best (1977) claimed that, “Particularly all human knowledge can be found in books and libraries, unlike animals that must start a new work with each generation men builds upon the accumulated and recorded knowledge of the post”. Keeping in view the stated purposes, the researcher has made an attempt to survey the related literature in the field.

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