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https://elibrary.tucl.edu.np/handle/123456789/11609
https://elibrary.tucl.edu.np/handle/123456789/11606
https://elibrary.tucl.edu.np/handle/123456789/11611
https://elibrary.tucl.edu.np/handle/123456789/11627
https://elibrary.tucl.edu.np/handle/123456789/11628
https://elibrary.tucl.edu.np/handle/123456789/11631
https://elibrary.tucl.edu.np/handle/123456789/11578
https://elibrary.tucl.edu.np/handle/123456789/11579
https://elibrary.tucl.edu.np/handle/123456789/11583
https://elibrary.tucl.edu.np/handle/123456789/11584
https://elibrary.tucl.edu.np/handle/123456789/11580