Shegel, R. L.
An introduction to Universal Decimal Classification / Shegel, R. L. - New Delhi : ESS Ess, 1994. - 266 p. ; 22 cm.
Calassification
025.432 / SEI
An introduction to Universal Decimal Classification / Shegel, R. L. - New Delhi : ESS Ess, 1994. - 266 p. ; 22 cm.
Calassification
025.432 / SEI