Number building in Dewey decimal classification,universal decimal classification and colon classification. /
Sehgal, R. L.
Number building in Dewey decimal classification,universal decimal classification and colon classification. / Sehgal, R. L.
025.43 S41N R
Number building in Dewey decimal classification,universal decimal classification and colon classification. / Sehgal, R. L.
025.43 S41N R