Sardana, J L.
Universal Decimal Classification Structure and Methodology / - 1st ed / - New Delhi-2 : Ess Ess Publications , 1970 - p.208,vi :
2:51M96 / M3;1
Universal Decimal Classification Structure and Methodology / - 1st ed / - New Delhi-2 : Ess Ess Publications , 1970 - p.208,vi :
2:51M96 / M3;1