00404nam a22001217a 450000500170000002000180001708200100003510000170004524500580006226000560012030000510017650400550022720260401123438.0  a9789369675593  a511.1  aPandey, Abha  aDiscrete and combinatorial mathematics /cAbha Pandey  aNew Delhi :bScientific Books International,c2026.  av, 256p. ;Includes biblographical references 9  aIncludes bibliographical references (p. 253 - 256)