Universal Decimal Classification English Abridged edition 1961
B S I
Universal Decimal Classification English Abridged edition 1961 by B S I - 3 - London British standards Institution 1963
Photo copy
025.43 UDC;20
Universal Decimal Classification English Abridged edition 1961 by B S I - 3 - London British standards Institution 1963
Photo copy
025.43 UDC;20