Singh, Ram SHobhit .
Encyclopaedia of research techniques in library and information science Vol.2 / edited by Ram Shobhit Singh. - New Delhi : Anmol Publications , 2008. - 629p. ;
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Encyclopaedia of research techniques in library and information science Vol.2 / edited by Ram Shobhit Singh. - New Delhi : Anmol Publications , 2008. - 629p. ;
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