Sehgal,R L. (1994). Introduction to Universal Decimal classification. Ess Ess.
Chicago Edition CitationSehgal,R L. Introduction to Universal Decimal Classification. New Delhi: Ess Ess, 1994.
MLA Edition CitationSehgal,R L. Introduction to Universal Decimal Classification. Ess Ess, 1994.
Warning: These citations may not always be 100% accurate.