KO KNOWLEDGE ORGANIZATION / Universal Decimal Classification : Pocket Edition. [Ed. by Geoffrey Robinson]. London: British Standards Institution, 1999. 288 p. ISBN 0-580-33045-1. DISC PD 1000 : 1999. (M.P. Satija)
KO KNOWLEDGE ORGANIZATION / Universal Decimal Classification : Pocket Edition. [Ed. by Geoffrey Robinson]. London: British Standards Institution, 1999. 288 p. ISBN 0-580-33045-1. DISC PD 1000 : 1999. (M.P. Satija)
