Sehgal, R. (1993). Number building in Dewey Decimal Classification, Universal Decimal Classification, Colon Classification (1st.). Ess Ess.
Chicago Edition CitationSehgal, R.L. Number Building in Dewey Decimal Classification, Universal Decimal Classification, Colon Classification. 1st. New Delhi: Ess Ess, 1993.
MLA Edition CitationSehgal, R.L. Number Building in Dewey Decimal Classification, Universal Decimal Classification, Colon Classification. 1st. Ess Ess, 1993.
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