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https://elibrary.tucl.edu.np/handle/123456789/10759
https://elibrary.tucl.edu.np/handle/123456789/10761
https://elibrary.tucl.edu.np/handle/123456789/10760
https://elibrary.tucl.edu.np/handle/123456789/10762
https://elibrary.tucl.edu.np/handle/123456789/10764
https://elibrary.tucl.edu.np/handle/123456789/10784
https://elibrary.tucl.edu.np/handle/123456789/10782
https://elibrary.tucl.edu.np/handle/123456789/10785
https://elibrary.tucl.edu.np/handle/123456789/10781
https://elibrary.tucl.edu.np/handle/123456789/10783
https://elibrary.tucl.edu.np/handle/123456789/10790