Kumar, P. S. G. (2004). Information sources and services: Theory and practice. B R Publishing Corporation.
Dyfyniad Arddull ChicagoKumar, P. S. G. Information Sources and Services: Theory and Practice. New Delhi: B R Publishing Corporation, 2004.
Dyfyniad MLAKumar, P. S. G. Information Sources and Services: Theory and Practice. B R Publishing Corporation, 2004.
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