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1.	Image from Google Jackets Image from OpenLibrary	Discrete Mathematics And by "Biswal Purna Chandra," Material type: Text; Format: print ; Literary form: Not fiction Publication details: New delhi ; Prentice Hall ; 2005 Availability: Items available for loan: IET Lucknow Central Library (1).
2.	Image from Google Jackets Image from OpenLibrary	Discrete mathematics and by "Biswal, Purna . Chandra" Material type: Text; Format: print ; Literary form: Not fiction Publication details: New Delhi ; P.H. I ; 2005 Availability: Items available for loan: IET Lucknow Central Library (1).
3.	Image from Amazon.com Image from Google Jackets Image from OpenLibrary	DISCRETE MATHEMATICS AND GRAPH THEORY 4/ED by "BISWAL, PURNA. CHANDRA....." Material type: Text; Format: print ; Literary form: Not fiction Publication details: PHI LEARNING Availability: Items available for loan: IET Lucknow Central Library (3)Call number: 511.1 BIS, ...

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