00525nam a22001697a 450000500170000001000170001702000270003403500170006103700190007808200080009710000220010524500740012726000440020127000580024530000200030370000320032320240103104931.0  aB-756759-760  a9789392594243c1100.00  aB-756759-760  aSunnvik Books   a020  aBalasubramanian,P  aClassification Theory/cBy P. Balasubramanian and C. Catherin Beula    aNew Delhi bEss Ess Publications c2023  a4831/24, Ansari Road, Darya Ganj bNew Delhi e110002  a216p.c22cm(Hb)  aBeula, C. CatherineAuthor